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Copyright of China Synthetic Fiber Industry is the property of Sinopec Baling Petrochemical Company and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Polymer Materials Science & Engineering is the property of Sichuan University, Polymer Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Synthetic Fiber Industry is the property of Sinopec Baling Petrochemical Company and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Synthetic Fiber Industry is the property of Sinopec Baling Petrochemical Company and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Condiment is the property of China Condiment and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Six kinds of natural rubbers and two kinds of isoprene rubbers were extracted with acetone as the solvent, and the selection of the internal standard for quantitative analysis of raw rubbers of natural rubber and isoprene rubber and vulcanizates of natural rubber, isoprene rubber and natural rubber/isoprene rubber blend was based on the diffe-rence in the composition of acetone extract concentrate of natural rubber and isoprene rubber. In addition, acetone extract concentrate was analyzed by internal standard method, and the identification method of natural rubber, isoprene rubber and natural rubber/isoprene rubber blend was established. Finally, the method was applied to the identification of the main components of the submitted samples. The results showed that squalane could be used as the internal standard for quantitative analysis of natural rubber, isoprene rubber and natural rubber/isoprene rubber blend. Under the preferred gas chromatography-mass spectrometry quantitative analysis and detection conditions, the blending ratio of natural rubber and isoprene rubber in natural rubber/isoprene rubber blend could be measured by the qualitative analysis of γ-sitosterol and γ-tocotrienol in natural rubber, combined simultaneously with the quantitative analysis of the specific antioxidant in the acetone extract concentrate of vulcanizate by internal standard method, of which the deviation was -5% when the characteristic fragment ion whose mass to charge ratio was 296 was used as the referenced characteristic fragment ion for quantitative analysis. The identification method showed good results in identifying the main components of the submitted samples.

The structure and properties of high modulus natural rubber (NR) / cis-1,4-polybutadiene rubber (BR) blends reinforced with carbon black and modified with trans-1,4-poly(butadiene-co-isoprene) rubber (TBIR) and low Mooney viscosity trans-1,4-poly(butadiene-co-isoprene) rubber (LTBIR) were investigated. The results showed that both of the TBIR and LTBIR could significantly improve the compatibility between NR and BR. Compared with NR/BR vulcanizates, the mechanical properties and resilience of high modulus NR/BR vulcanizates modified with TBIR and LTBIR with reducing 4 phr (mass) carbon black were improved, wear volume reduced by 13%, compression heat generation reduced by 10%, rolling resistance reduced by 20%, first-grade flex fatigue life improved by about 1.6 times, and sixth-grade flex fatigue life improved by about 1.1 times.

The rubber blends for rubber roller were prepared with natural rubber, styrene-butadiene rubber and trans-1,4-poly(butadiene-co-isoprene) rubber, the effects of trans-1,4-poly(butadiene-co-isoprene) rubber amount on the compatibility, curing characteristics, mechanical properties, wear resistance and aging resistance of the blends were investigated. The results showed that as the trans-1,4-poly(butadiene-co-isoprene) rubber amount increased from 0 to 20 phr (mass), the crosslinking density of the blend increased gradually and curing time shortened, tensile strength increased gradually, hardness increased slightly, compression permanent set showed a downward trend, and wear resistance improved. The compatibility of the three rubbers was good, and the dispersion of filler and aging resistance of the blending rubber were improved.

The optimal design of curing agent amount and radiation absorbed dose in application of radiation crosslinking technology for ethylene-propylene-diene rubber / natural rubber blends was discussed. By combining the amount of curing agent and radiation absorbed dose to form different crosslinking schemes, regression equations between the curing agent amount and radiation absorbed dose and modulus at 100%, tensile strength and elongation at break were obtained by regression analysis of test results of the blend properties under different crosslinking schemes. According to the regression equations, 2-dimensional contour diagram and 3-dimensional surface diagram were displayed through visual simulation, and the results of regression ana-lysis were verified by optimizing crosslinking combination schemes. The results showed that the increase of increment coefficient of curing agent and radiation absorbed dose could increase elastic modulus of the blend, leading to an increase in modulus at 100% and a decrease in elongation at break. With the increase of curing agent amount and radiation absorbed dose, tensile strength of the blend first increased and then gradually decreased. The scheme of high curing agent amount with low radiation absorbed dose was suitable for preparing rubber materials with high requirements on modulus and strength, while the low curing agent amount with high radiation absorbed dose scheme was suitable for materials with high requirements on elongation at break and aging resistance.

The relationship between crosslinking density and storage modulus of chloroprene rubber (CR) / ethylene-propylene-diene rubber (EPDM) blend was studied and the fitting model was established. The relationship between the crosslinking density, storage modulus and stress relaxation properties of each component in the blended rubber was also investigated. The results showed that the applicable temperature range of the model was 35-80 ℃ and the crosslinking density of the two phases were linearly related to the storage modulus. When m(CR)/m(EPDM) was 70/30, the predicted value of the storage modulus model of CR/EPDM blend was close to the measured value, which proved that the model had high reliability. The effect of CR phase on the total storage modulus of CR/EPDM blend was greater. The stress relaxation property of the blend had a linear relationship with the crosslinking density and storage modulus of each component.

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Warm-sector rainfall event under the background of weak synoptic-scale forcing is difficult to predict accurately due to its abruptness and nonlinear, thus ensemble forecasts have become one of the crucial options considering uncertain factors. However, the core problem of convection-allowing ensemble forecast is that the spread is low after integration for a period, which will lead to prediction failure. Therefore, this paper compares the differences among the convection-allowing ensemble forecast schemes with different scale information for perturbations, and optimizes the initial perturbation scheme for the warm-sector rainstorm over the middle and lower reaches of the Yangtze River. Four convection-allowing ensemble forecast experiments with different initial perturbation schemes including dynamic downscaling (DOWN), breeding of the growing mode (BGM), Local BGM (LBGM), and BLEND, were carried out for a typical warm-sector rainfall on May 4-5, 2018. The aim is to explore the impact on spread and forecast. The results show that the ensemble forecast results of LBGM and BGM are better than that of DOWN in 0~6 h in the early stage of model integration, and LBGM has a certain degree of improvement compared with BGM, which indicates that accurate small and medium scale perturbations can obtain effective growth at this stage. After 12 hours of integration, the forecast effect of DOWN is better than that of BGM and LBGM instead, which indicates that after the initial error increases rapidly for a period, the large-scale perturbations begin to play a major role. However, BLEND possesses the advantages of both LBGM and DOWN, and has a good forecast effect in almost the whole forecast period, reflecting the superiority of multi-scale blend initial condition perturbations. Since the convection-allowing ensemble forecast for this type of events are sensitive to the scale characteristics of the initial condition perturbations, adjusting the scale of the initial condition perturbation has certain significance in operation for the development of high-quality convection-allowing ensemble forecast system. [ABSTRACT FROM AUTHOR]

Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Polymer Materials Science & Engineering is the property of Sichuan University, Polymer Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

"Millable polyurethane rubber (MPU)/ poly(dodecalactam) (PA 12) thermoplastic vulcanizate (TPV) was prepared via dynamic vulcanization method, and the dynamic vulcanization process of MPU/PA 12 TPV was explored by controlling the dynamic vulcanization time, At the same time, physical and mechanical properties, and dynamical mechanical properties of the blends in different dynamic vulcanization stage were studied. The results showed that with the extension of dynamic vulca-nization time, MPU/PA 12 TPV gradually completed the phase transformation process. Under the action of temperature and shear force, MPU phase changed from continuous phase to dispersed phase, while PA 12 phase changed from dispersed phase to conti-nuous phase. Storage modulus of MPU/PA 12 blends increased, loss modulus decreased, and loss factor reduced with the extension of dynamic vulcanization time. In addition, the comprehensive mechanical properties of MPU/PA 12 blends were improved with the extension of dynamic vulcanization time."

Effects of liquid polybutadiene rubber activity-50 on the processability and fatigue resistance of cis-1,4-polybutadiene rubber (BR)/natural rubber (NR) blends were investigated. The fatigue resistance of vulcanizates was investigated from the perspective of fatigue crack propagation using crack growth test platform and finite element ABAQUS/CAE. The results showed that activity-50 could reduce the storage modulus and viscosity of the rubber blend, and the addition of activity-50 in the rubber blending process could improve the processability of the system. Adding 2 phr and 4 phr of active-50 could reduce the crack growth rate. When the amount of active-50 continued to increase, the crack would accelerate. Adding an appropriate amount of activity-50 could improve the processability and fatigue resistance of BR/NR blend.

Nitrile rubber（NBR）/polyvinyl chloride（PVC） composite systems reinforced by single walled carbon nanotubes (SWCNTs) were prepared by the addition of SWCNTs with different diameters to NBR/PVC composite system, which was prepared by blending method of nitrile rubber and polyvinyl chloride.The amorphous molecular models of NBR/PVC and NBR/PVC composite systems reinforced by SWCNTs with different diameters were constructed by Material Studio software, and the mechanical and friction properties of four kinds of composite systems were calculated, and the calculation results were compared and analyzed.The results showed that the elastic modulus, hardness and toughness of the composite systems reinforced by SWCNTs were improved to a certain extent except that the friction coefficient and wear loss were decreased.Under the action of external force, the surface material was not easy to fall off, the wear resistance of the composite system was improved, and the service life of the stator rubber was extended.

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Plastics Science & Technology / Suliao Ke-Ji is the property of Plastics Science & Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The rheological behaviors of fiber - grade polypropylene (PP)/propylene - ethylene copolymer (PEC) blends were studied by a capillary rheometer and rotational rheometer, and the effects of shear rate, temperature and blend composition on the rheological behaviors were analyzed. The results indicated that PP, PEC and their blends exhibited a shear-thinning behavior with an increase of shear rate. However, with the increase of temperature, the apparent viscosity of the blends gradually decreased especially at low shear rates. On the other hand, the non-Newton index of the blends tended to increase with an increase of PEC content, but their viscous flow activation energy decreased. This indicated that the sensitivity of viscosity to temperature decreased, and the melt shear modulus and melt elasticity increased. [ABSTRACT FROM AUTHOR]

The dynamic viscoelastic behavior and phase morphology of high impact polystyrene (HIPS)/high density polyethylene (HDPE) blends were investigated by dynamic rheological test and scanning electron microscopy (SEM). The compatibilizing effect of 1%(mass fraction, same as below) micron-CaCO3 and nano-CaCO3 on HIPS/HDPE(30/70) immiscible blend was compared. The results indicate that the complex viscosity and storage modulus of HIPS/HDPE blends at low frequencies show positive deviation from the mixing rule when HDPE is less than 30%, while negative deviation is observed when HDPE is more than 30%. The former is related to the interaction between HDPE and PB particles and the latter is attributed to the poor interfacial interaction between HDPE matrix and PS particles. When HIPS is the matrix phase, HDPE particles display broad size distribution. When HDPE acts as a matrix phase, PS dispersed phase exhibits bimodal size distribution corresponding to the presence of two different types of PS dispersed particles. 1% nano-CaCO3 has a certain compatibilizing effect on HIPS/HDPE(30/70) immiscible blend, which is mainly located at HIPS/HDPE interface and in the HDPE matrix, while micron-CaCO3 acts as viscosifier rather than compatibilizer, which is confined in the HDPE matrix.

A series of ethylene-propylene block copolymers (EP) with different molecular weights and average sequence length of ethylene monomer units were designed and synthesized by using slurry polymerization process and then used as a compatibilizer for polypropylene (PP) /ethylene-propylene rubber (EPR) blends. The effects of the content and molecular weight of block copolymer on the performance and the evolution of dispersed phase of the blends were investigated. The results indicated that there was an optimum content of EP for compatibilization in the PP/EPR blending system. The addition of EP in a small amount could efficiently control the size and morphology of dispersed phase and therefore enhanced the impact strength of the blends significantly. Meanwhile, the higher molecular weight for EP was beneficial to the impact performance of the blends. The similarity in the composition of EP and EPR was crucial to the compatibilization effect for PP/EPR blends. [ABSTRACT FROM AUTHOR]

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of the Tianjin Polytechnic University / Tianjin Gongye Daxue Xuebao is the property of Journal of Tianjin Polytechnic University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To improve the compatibility of PP and PA6, the PP/PA6/Surlyn blends were prepared by melt blending with a twin-screw extruder uring ethylene-methyl methacryiate ionomer (Surlyn8920) as an additive. The stucture and mechanical properties of the residing blends were investigated by FTIR, XRD, DSC, SEM and tensile tests. The results indicated that the complexation between Surlyn8920 and PA6 reduced the crystallization and melting temperatures, crystalune degree and crystal perfection of PP and PA6. Moreover, the tuze of PA6 as a dispersed phase became smaller and its distibution became more uniform. The introduction of Surlyn8920 significantly modified the interfactial compatibility between PP and PA6, and an optimum compatibilizing effect was achieved by the addition of 7 wt% Surlyn8920. With this loading of Surlyn8920, the blends obtained the tensile strength at break of 40. 59 MPa, elongation at break of 56. 3 % and impact strergth of 4. 98 kj/m². [ABSTRACT FROM AUTHOR]

Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A water-assisted injection molding (WAIM) experiment was carried out for polypropylene ( PP )/polyamide 6 ( PA6 ) blends on a lab-developed WAIM experimental platform. The experimental and theoretical methods were combined to investigate the effect of processing parameters on the residual wall thickness (RWT), surface quality and mechanical properties of the pipe obtained from WAIM. The results indicated that the RWT decreased gradually with increasing the melt temperature, mold temperature and water injection pressure, and however it increased with an increase in water injection delay time. Moreover, the tensile strength of the pipe increased gradually with the increase of mold temperature and water injection delay time. Nevertheless, when the melt temperature and water injection pressure were improved, the tensile strength tended to decrease gradually. The processing parameters affected the temperature field and therefore influenced the nucleation and crystal growth as well as the final crystallinity. The higher the degree of crystallinity, the higher was the tensile strength of the pipes. [ABSTRACT FROM AUTHOR]

A series of poly(lactic acid) (PLA)/polyurethane (PU) blends were prepared by in-situ reaction of PLA with poly(tetramethylene ether glycol) (PTMG) and carbodiimide-modified MDI (L-MDI). The reaction principle, mechanical properties, fracture morphology, dynamic rheological properties and crystalline properties of the resulting blends were investigated. The results indicated that micro-crosslinked polyurethane was formed during the in-situ reaction process along with the chain extension and branching of PLA. The mechanical results demonstrated that the toughness of PLA/PU blends was significantly enhanced, and their elongation at break, tensile toughness and notch impact strength were improved by 230%, 134.13 MJ/m³ and 34.19 kJ/m², respectively, compared to pure PLA, when 30 wt% of PU was incorporated. The toughening mechanism may be due to the crazes and shear zones induced by PU rubbery phase in the matrix. The rheological results indicated that the melts of pure PLA and its blends with PLA were pseudoplastic fluid, and however, the blends had a higher storage modulus and complex viscosity. The crystallization test suggested that the PLA/PU blends had a higher crystallization rate and more perfect level of crystallization in comparison with pure PLA. [ABSTRACT FROM AUTHOR]

Blend base membranes (BPPEK/PPEK) were prepared from brominated poly(phthalazinone ether ketone) (BPPEK) with the bromide degree of 0.95 and poly(phthalazinone ether) s (PPEK) by casting solution. Then the base membranes were quaternized and acidized successively to obtain QBPPEK/PPEK membranes. Water uptake, swelling ratio, on exchange capacity (IEC), vanadium on permeability, area resistance and microstructure of QBPPEK/PPEK membranes were investigated. The area resistance of QBPPEK/PPEK membranes increased, but on exchange capacity, water uptake and vanadium on permeability decreased with an increase in the mass ratio of PPEK. Compared with Naion115 membrane, QBPPEK/PPEK membranes showed much lower vanadium on permeability and higher columbic efficiencies. When the content of PPEK reached 10%, the energy efficiency of VRB cell with QBPPEK/PPEK membrane was 88.9%. What's more, the introduction of PPEK could improve the oxidative stability of QBPPEK/PPEK membranes. [ABSTRACT FROM AUTHOR]

The inverted classroom arose from high information technology. It is a blended pedagogical approach established on the basis of the rapid development of multi-media. with the help of network, micro-lectures, journals and other means of technology, instructors materials, which students will use to do self-directed learning in advance of class;And in the classroom phase, teacher and students are engaged in collaborations, finding, analyzing, discussing and working through problems, so that students could consolidate and complement knowledge they have mastered before;Then students will take examinations to check their performance and access the class mode in order to improve it. The main object of the inverted classroom is to strengthen students' capability of learning, make them acquire the basics quickly, and improve their ability of analysis, synthesis and evaluation. A successful flipped classroom should have such goals: (1) improve students' activeness, allow them to master the basis quickly;(2) engage students and instructors fully;(3) stimulate students to understand the material deeply;(4) Teach them to be critical thinkers;(5) Improve their capacities of analyzing, synthesizing and evaluating. Because the structure of health care system is complex in China, many fields interrelate with each other. A single teaching mode cannot meet the current teaching requirements. How to make the application of the flipped classroom more effective is the critical problem of our experts. [ABSTRACT FROM AUTHOR]

Copyright of Journal of the Tianjin Polytechnic University / Tianjin Gongye Daxue Xuebao is the property of Journal of Tianjin Polytechnic University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Blends of poly(methyl methacrylate) (PMMA) and polyvinyl butyral) (PVB) exhibit zero-birefringence due to the compensation of negative birefringence of PMMA and positive birefringence of PVB. respectively. The zero-birefringence composition of drawn-quenched specimens was found to be quite different from that induced by deformation at room temperature. The zero-birefringence composition was calculated by the additivity of the orientation and/or distortion birefringence of the neat component polymers, which were evaluated by the curve fitting procedures of the relaxation birefringence and relaxation stress. The calculation results revealed that the birefringence of the drawn-quenched specimens is attributed to the orientation birefringence in the glassy state while that of the deformation at room temperature is attributed to both orientation and distortion birefringence at room temperature. [ABSTRACT FROM AUTHOR]

We discuss the simulation of realistic snow scene and contrive a method of real-time snow rendering. We determine the effective points storing snow based on Quad-tree Level of Detail Model and make these points be adapted to rugged terrain of the ups and downs. In the course of the snow, we further consider the characteristics of the terrain and set the snow collection factor for each point. In rendering an effective point, we compute the normal vectors to improve the interaction with light effects. We introduce "blend" to simulate the gradual increase in the progress of snow and improve the visual effect of snow cover from scratch to have a sense of snow thickness of the traditional methods. Experimental results further show that the method satisfied both the realistic and real-time needs. [ABSTRACT FROM AUTHOR]

The mink fiber has a high value in worsted industry. The basic properties of the mink fiber are similar to the cashmere, while the warmth of the mink fiber is more superior to the cashmere. Because of the short length and high static, the spinning performance of mink fiber is poor. Considering all of these reasons, we take polyamide, tencel and viscose to blend with the mink fiber. Then through weaving and related finish, the knitting fabrics of different weave introduced in this article are obtained. Then use properties of these textiles, appearance properties, basic physical properties and stile features and the like, are analyzed. It shows that mink knitting products with mixed spinning have fine use properties. [ABSTRACT FROM AUTHOR]