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Polymer-tethered nanoparticles with different geometric shapes are very useful fillers of polymer nanocomposites. Herein, a universal approach for the fabrication of such nanoparticles with precisely controlled shape and composition is reported. By microphase separation of poly(3-(triethoxysilyl)propyl methacrylate)-block-polystyrene (PTEPM-b-PS) in the presence of oligomers, o-TEPM (oT) and/or o-S (oS), followed by cross-linking and dispersion in PS solvent, precisely tailored PS-grafted nanoparticles were prepared. These particles include those with varied shapes but identical PS shells, particles with varied core sizes but the same PS shell, and particles with fixed shapes but varied PS shells. These particles are ideal model nanofillers to study the dynamics and reinforced mechanism of polymer nanocomposites.

(Zr47Cu44Al9)100−xNbx (x = 0, 1, 2, 3, and 5 at.%) bulk metallic glasses (BMGs) were prepared by copper mould casting. The influence of Nb addition on glass-forming ability (GFA), thermal stability and mechanical properties of ZrCuAl alloys was studied. The GFA of Zr47Cu44Al9 BMGs is enhanced obviously after the addition of Nb. The critical size of completely amorphous sample increases from 4 mm for Zr47Cu44Al9 to 10 mm for (Zr47Cu44Al9)98Nb2 alloy. The average activation energy of crystallization is 505 kJ/mol for (Zr47Cu44Al9)98Nb2 BMG, which is larger than that of Zr47Cu44Al9 BMG with 443 kJ/mol. The fracture strength and plasticity are sensitive to the Nb content. (Zr47Cu44Al9)98Nb2 BMG exhibits high fracture strength of 2397 MPa and prominent plastic strain of 13.2%, and multiple shear bands with high density were observed. Furthermore, the possible mechanisms involved in obtaining high GFA and large plasticity were explored.

We reported here the studies of a series of Zr20Ti20Hf20M20Be20 (M = Cu, Ni and Co) quinary high entropy bulk metallic glasses. Glasses with critical diameters (Dc) of 3 mm, 8 mm and 5 mm, respectively has been successfully fabricated by copper mold casting. Strikingly, a plastic strain of 11.6% is achieved in the Zr20Ti20Hf20Cu20Be20 metallic glass. The dynamic fragility the Zr20Ti20Hf20Cu20Be20 alloy is determined from calorimetric measurements. The excellent plasticity is explained to be attributed to relatively higher fragility. Keywords: High entropy alloys, Bulk metallic glasses, Glass forming ability, Mechanical property and fragility

Graphene aerogels combining elastic, lightweight, and robust mechanical properties have been explored for a wide variety of applications. However, graphene aerogels are generally subject to brittle mechanical properties and the irreversible damage of network structures during extreme compressions. Thus, the challenge of finding ways to enhance the strength and resilience of graphene aerogels remains. Herein, superelastic and ultralight aerogels are fabricated through a thermal-treatment of 3D ordered graphene aerogels. The treatments at 400-1000 °C eliminate most of the oxygen-containing functional groups and enhance the π-π stacking interactions between graphene sheets, forming a well-ordered structure of graphene sheets in cell walls. The aerogels can withstand a loading of 100 000 N (109 times their own weight) for 60 min and retain their substantial elastic resilience. This loading corresponds to an ultimate compressive stress of approximately 1000 MPa and a strain of 99.8%, and this ultimate stress is 1-2 orders of magnitude higher than the values for other (carbon-based, polymer-based, inorganic-based, and metal-based) porous materials. The superelastic properties can be attributed to the graphite-like ordered structure of cell walls. The successful fabrication of such superelastic materials opens a new avenue to explore their potential applications in pressure sensors, mechanical shock absorbers, soft robots, and deformable electronic devices.

The stress distribution of the Ultra-High Pressure (UHP) vessel is uneven, the inner layer stress value is the maximum and the outer layer stress value is the minimum, resulting in insufficient utilization of the outer layer material and reduced fatigue strength. In order to obtain the pressure when the UHP vessel bursts into failure, this paper proposes a new formula for calculating the burst pressure and uses 30 experimental sample data to verify the accuracy. The error of the calculation result is about 5% lower than the error of the traditional Faupel burst pressure formula by 15%, and is not affected by the tensile strength.The UHP vessel improves the stress distribution and improves the fatigue life using autofrettage technology, reverse yielding does not occur when the best autofrettage pressure is unloaded, and the yield strength is calculated using the burst failure criterion method. Simultaneously, the Shigley method is used to predict the fatigue life of the autofrettaged UHP vessel to prove that its fatigue life has been significantly improved.

Aluminum-doped ZnO (AZO) thin films with thin film metallic glass of Zr50Cu50 as buffer are prepared on glass substrates by the pulsed laser deposition. The influence of buffer thickness and substrate temperature on structural, optical, and electrical properties of AZO thin film are investigated. Increasing the thickness of buffer layer and substrate temperature can both promote the transformation of AZO from amorphous to crystalline structure, while they show (100) and (002) unique preferential orientations, respectively. After inserting Zr50Cu50 layer between the glass substrate and AZO film, the sheet resistance and visible transmittance decrease, but the infrared transmittance increases. With substrate temperature increasing from 25 °C to 520 °C, the sheet resistance of AZO(100 nm)/Zr50Cu50(4 nm) film first increases and then decreases, and the infrared transmittance is improved. The AZO(100 nm)/Zr50Cu50(4 nm) film deposited at a substrate temperature of 360 °C exhibits a low sheet resistance of 26.7 Ω/□, high transmittance of 82.1% in the visible light region, 81.6% in near-infrared region, and low surface roughness of 0.85 nm, which are useful properties for their potential applications in tandem solar cell and infrared technology.

Styrene–maleic anhydride copolymer (SMA) was used as a compatibilizer to improve the interfacial interaction between graphene sheets and polystyrene matrix. SMA mediated graphene sheets are closely encapsulated by a polymer layer and uniformly dispersed compared to the graphene sheets without SMA. The presence of SMA not only improves the melt modulus and its frequency-independence, but also results in an earlier transition from liquid-like to solid-like, indicating the formation of a percolated conducting network at a low content of graphene with the assistance of SMA. Accordingly, the different frequency dependences of electrical conductivity also lead to a much lower threshold of 0.17 vol.% for SMA modified nanocomposites compared to 0.52 vol.% for the unmodified counterparts, further confirming the earlier formation of a graphene network in the matrix. The improved rheological and electrical properties of the polystyrene nanocomposites are attributed to the homogeneous dispersion of the graphene sheets and the enhanced interfacial interaction between the graphene sheets and the polystyrene matrix.

Pt-loaded WO3 thin films were deposited on oxidized Si substrates under various discharge gas pressures at room temperature using reactive magnetron sputtering. Structural characterizations by means of X-ray diffraction and field emission scanning electron microscopy show that the films composed of nano-size grains have a monoclinic structure. The films become more porous as the discharge gas pressure increases due to the decrease in film density and the increase in effective surface area. Gas sensing properties demonstrate that the films show reversible response to H2S with various concentrations. Under the same operating conditions the sensor response increases and the operating temperature at which the maximum response is shown decreases with discharge gas pressure. The highest response of 3512 is obtained for a Pt-loaded porous film deposited at 12Pa upon exposure to 5 ppm H2S at an operating temperature of 100 degrees C. Such a high response of a Pt-loaded porous film at a low operating temperature is discussed in relation to the Schottky-barrier-limited transport as well as the chemical mechanism of Pt loading. (C) 2013 Elsevier B.V. All rights reserved.

The effect of partial substitution of Al for Zr on the mechanical properties of Zr35-xTi30Cu7.5Be27.5Alx (x=0, 1, 1.5, 2, 2.5, 5, at%) bulk metallic glasses were studied by uniaxial compression test. The results showed that the compressive plasticity can be greatly improved from 0.95% (x=0) to 15.10% (x=1.5) and 3.45% (x=2) in Zr35Ti30Cu7.5Be27.5 bulk metallic glass. The fracture morphologies of the Zr35-xTi30Cu7.5Be27.5Alx bulk metallic glasses were characterized by means of scanning electron microscope (SEM). Transmission electron microscope (TEM) was employed to investigate the microstructures of the bulk metallic glasses containing different amounts of Al. It is found that the enhanced compressive plasticity could be attributed to the nanoscale heterogeneity in the bulk metallic glasses. The effect of Al addition on the microstructure and deformation behavior of the Zr-based bulk metallic glasses was discussed in terms of different critical shear stress (CSS).

This is Part I of a two part series study on mechanical ruling of diffraction grating. Mechanical ruling is a major method for fabricating diffraction grating. In mechanical ruling, the first step is to prepare the Al film. High quality preparation technique is needed to satisfy the requirements of the thickness and the mechanical properties of the film. The purpose of this paper is to present a complete study on the preparation technique and mechanical properties of the Al film used for mechanical ruling of diffraction grating. XRD and SEM experiments and analysis were conducted to investigate the microstructure of the Al film and the mechanical properties of the Al film were measured using nanoindentation and scratch tests. The Al film exhibits favorable mechanical properties which will the key for the experimental and numerical simulation studies of mechanical ruling of diffraction grating.Copyright © 2016 by ASME

The distribution of maleated styrene-hydrogenated butadiene-styrene (mSEBS) elastomer and nano-SiO2 in nylon 6 matrix was controlled by varying the blending procedure. Nano-SiO2 particles with different surface properties (hydrophilic versus hydrophobic) were adopted to adjust their interactions with other components. Two different structures, separate dispersion of nano-SiO2 and elastomer particles as well as encapsulation of nano-SiO2 fillers by the elastomer, were obtained. The structures were confirmed through scanning electron microscope (SEM) investigation. The mechanical measurement results showed that the microstructure and the interactions among the components had dramatic influences on the final mechanical properties, especially Izod fracture toughness, for the ternary nanocomposites. The nanocomposites containing hydrophilic nano-SiO2 had better mechanical performances compared with the composites filled with hydrophobic SiO2 when they were in the same microstructure. The nanocomposites with separate dispersion structure showed higher stiffness compared with those of encapsulation type. However, the separately dispersed nano-SiO2 particles restricted the cavitation of elastomer phases that led to low toughening effectiveness. The difference of cavitation intensity for elastomer phase was revealed by SEM investigation on the facture surfaces for the nanocomposites with the two different microstructures. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

A new approach for improving the wear performances of nylon 6 (PA6)/clay nanocomposites was examined in this study. Two hybrid nanocomposites were prepared by melt blending a thermotropic liquid crystalline polymer (TLCP) and a well-dispersed PA6/clay nanocomposite, but with and without the incorporation of maleic-anhydride grafted polypropylene (MAPP) as compatibilizer. The addition of MAPP improved the compatibility between TLCP and matrix and thus enhanced the fibrillation of dispersed TLCP phase. Wear-testing results revealed that the wear resistance of the compatibilized hybrid nanocomposite could be improved effectively, as indicated by the low values of specific wear rate and frictional coefficient, especially under high-normal load (i.e., 80 N). Based on the characterization on the worn damage and the debris, it was suggested that abrasive wear was the main-damage mechanism for all the materials under investigation, except for the compatibilized hybrid nanocomposite. For this system, the wear damage was caused by a combination of abrasive and adhesive wearing because of the formation of transfer film on the counter pin surface from the wear debris. POLYM. ENG. SCI., 2010. © 2009 Society of Plastics Engineers

Rich husk (RH) is a naturally occurring inorganic/organic composite consisting mainly of lignocelluloses and silica. Due to the high silica content in RH, their addition into synthetic polymers may play certain synergistic roles in the flammability of the resulted composites. In this study, the thermal stability and flammability of RH-filled HDPE (HDPE/RH) ecocomposites with different compositions have been evaluated by thermogravimetric analysis and cone calorimetry, respectively. It is observed that the addition of RH has effectively delayed the thermo-oxidation process of the HDPE matrix by about 40 °C, and evident flame retardant effect has also been observed (in comparison to the results obtained from neat HDPE). From analysis carried out on the composition and structure of the combusted residues, it can be inferred that the main mechanisms for the flame retardancy in the HDPE/RH ecocomposite are due to the heat shielding and diffusion barrier effects of the silica-based protective layer which was formed during the heating process.

A facile method with the advantage of using only one single solvent throughout the whole processing was introduced to prepare graphite nanoplatelet (GNP) filled thermoplastic polyurethane (TPU) nanocomposites. Morphological studies showed that the employed method could provide the uniform dispersion of GNPs in the TPU matrix. Storage modulus of the nanocomposites was increased with increasing GNP content, and the improvement was more obvious at temperatures below the glass transition temperature (Tg) of TPU. For the nanocomposite that contains 3.9 vol% (the maximum loading employed in this study) of GNP, it still showed a long elongation at break of over 600%. Thermogravimetric analysis (TGA) showed that the incorporation of GNPs could improve the thermal stability of the nanocomposites. In addition, cone calorimetry results showed that the GNPs could act as intumescent flame retardant and significantly reduced the heat release rate (HRR), thus improved the flame retardancy of the TPU matrix.

In this study, a kind of novel all-cellulose ecocomposites based on cellulose and rice husk (RH) has been prepared by using green solvent, ionic liquid (IL), as processing medium. Due to the presence of the RH, these ecocomposites also contain an inorganic component, silica. The content and distribution of the silica in the ecocomposite have been investigated by energy dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) analyses. The mechanical properties of these ecocomposites, including both static and dynamic, have been determined by using tensile test and dynamic mechanical analysis (DMA), respectively. The effect of processing conditions on the interfacial bonding and therefore the mechanical performance of the final ecocomposites has been investigated further. Results show that the incorporation of the RH can provide stiffening effect for cellulose matrix, and the pretreatment of RH fillers by IL can enhance the filler/matrix interfacial bonding, thus further improving the mechanical performance of the ecocomposite. By selecting suitable composition ratios and processing conditions optimal mechanical performance with the balance among stiffness, strength and elongation at break can be obtained.

New graphene aerogels can be fabricated by vacuum/air drying, and because of the mechanical robustness of the graphene aerogels, shape-memory polymer/graphene hybrid foams can be fabricated by a simple infiltration-air-drying-crosslinking method. Due to the superelasticity, high strength, and good electrical conductivity of the as-prepared graphene aerogels, the shape-memory hybrid foams exhibit excellent thermotropical and electrical shape-memory properties, outperforming previously reported shape-memory polymer foams.

The “Rheological hybrid” effect, a phenomenon in which the melt viscosity of a ternary polymer blend decreases with increasing filler loading, due to the influence of the minor polymer phase in the blend, was investigated for Nylon 6/liquid crystalline polymer (LCP) blends after the addition of glass beads (GB). The apparent viscosity of the blended melts was measured by means of capillary rheometry. The viscosity of ternary Nylon 6/GB/LCP hybrid blends was the lowest among all the melts, i.e. lower than that of neat Nylon 6, LCP, binary Nylon 6/LCP and Nylon 6/GB blends. The viscosity of ternary Nylon 6/GB/LCP hybrid blends decreased with increasing glass bead content. Correspondingly, the morphology of the LCP droplets changed from spherical to fibrous with increasing glass bead content as well. For ternary hybrid blends with the same glass bead content and different bead sizes, the blend containing the smallest beads (1.2 μm in the diameter) had the lowest viscosity and strongest tendency to LCP fibrillation. A mechanism was proposed for correlating the rheological hybrid effect with LCP fibrillation in these ternary hybrid blends.

Polycarbonate (PC) was melt blended with small amount of liquid-crystalline polymer (LCP) and various contents of glass beads (GB) having different diameters. The rheological measurements indicated that the GB addition increased the viscosity ratio and seemed unfavorable to the LCP fibrillation. However, the morphological observation showed that the LCP fibrillation was promoted by the GB addition and varied with the GB packing. With the increased GB packing by increasing the GB content and/or decreasing the GB diameter, LCP deformed from spheres and ellipsoids into stretched ellipsoids at lower shear rates and into long fibrils at higher shear rates. Although higher content of smaller GB jammed into the larger LCP droplets and inhibited the LCP fibrillation, very long LCP fibrils formed at higher shear rates at a high enough packing of GB. The relationship between GB packing and LCP fibrillation revealed two kinds of hydrodynamic effects of GB promoting the LCP fibrillation: at lower GB packing, the shear flow was enhanced by the high local shear between GB, in quantity; and for a high enough GB packing, the shear flow was changed, in quality, into elongational flow, which was more effective for the LCP fibrillation. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 1020–1030, 2006

Gelcasting of ceramic components with the soldium alginate (Na-Alginate) as gelformers has received increasing attention. The aim of the present study is to improve the flexural strength of green body gelcast from nontoxic Na-alginate system by introducing a proper amount of water-soluble polymer, PVP. The rheological properties and gelling characteristics of PVP–Na-Alginate/Al2O3 suspensions were examined. Ceramic parts with uniform and homogeneous structure were fabricated as well as flexural strength and microstructure of the gelcast green and sintered bodies were highlighted.

A common and fatal problem of the low-toxicity gelcasting is the low flexural strength of green bodies. The objective of this study was to solve the problem by introducing water-soluble polyvinylpyrrolidone (PVP) polymer to the monomer system. The low-toxicity monomer and ceramic powder were selected as methacrylamide (MAM) and alumina, respectively. Flexural strength of green bodies was improved nearly by 30%, with no significant change in the property of sintered bodies when the addition amount of PVP is 2.8 wt.%. Influence of PVP content on rheological properties of alumina suspensions, their gelation time, and the microstructure of green and sintered bodies were investigated.

Aqueous gelcasting with a low toxicity monomer system has attracted increasing attention. The present study attempts to enhance the flexural strength of green bodies gelcast from a low toxicity hydroxyethyl methacrylate (HEMA) system by introducing an appropriate amount of the water soluble polymer polyvinylpyrrolidone (PVP). The rheological properties and gelling characteristics of PVP–HEMA/Al2O3 suspensions were examined. In addition, the flexural strength and microstructure of the gelcast green and sintered bodies are discussed.

The hierarchical structure of thermotropic liquid crystalline polymer (TLCP), especially microfibrils with an average diameter of 30 nm has been obtained in polyamide 6 (PA6)/TLCP/glass bead (GB) ternary blends by capillary flows. Thermodynamically the different interfacial tensions between PA6 and GB, and between TLCP and GB, make the glass beads migrate to the vicinity of the TLCP melt droplets. Then the strong extensional flow field formed by the micro-rollers of these glass beads exerts strong extensional action on TLCP coils so that results in the formation of TLCP microfibrils, which are usually generated with neat TLCP melt only. The hierarchical structure of thermotropic liquid crystalline polymer (TLCP) in PA6/TLCP/GB ternary blends can enhance mechanical performance of such blends.

Three polycarbonate (PC) composites that were reinforced, respectively, with liquid crystalline polymer (LCP), glass fibers, and both of them were prepared by a single injection-molding process. The role of LCP in improving the processibility of the composites was characterized by torque measurement test. The transitions of LCP morphology in two- and three-component composites were investigated by using polarizing optical microscopy and scanning electron microscopy. The micrographs showed a skin–core gradient structure in all three systems investigated, and the addition of glass fiber to the PC/LCP blend affected the morphological transition and content distribution of dispersed LCP phase through the thickness of the injection-molded samples. These results were correlated well with the measurements of tensile mechanical properties and dynamic mechanical analysis. How to fully use the dispersed LCP phase in PC in situ hybrid composites was discussed for the thickness change of core layer and the heterogeneous distribution of more LCP in the core. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 625–634, 2004

The sintering and compositional dependencies of dielectric properties in PMW–PT–PNN ceramics have been investigated. The present work confirms that sintering temperature had a large influence on the dielectric properties in this ternary system. It was found that the main causes for the flat temperature dependence are due to shifting and broadening of the dielectric anomaly.

At present time, grating mechanical scoring manufacture is process that diamond score reciprocates on the Aluminum film which is vacuum coating on the Chrome, glass and other substrates. As the structure and properties of stream Aluminum film affect the quality of groove greatly and are limited by the vacuum steam process, it is difficult to control and test the microstructure and mechanical properties of the film. In this paper, we recommend the new method that combine X-ray diffraction "nondestructive" test and nanopress-scratch testing technology. We can calculate the micro-structure, the aluminum film thickness and residual stress, analysis on the mechanical properties such as elastic modulus, hardness and stress-strain curve in this method in order to unveil the microstructure and mechanical properties of the aluminum film. Provide a feasible method for studying the microstructure and mechanical properties of the film and valuable reference and guidance on grating mechanical technology.

This article proposes a physical model for liquid quench of solid rocket motor and presents the results of experimental study. It is found that there is a critical value of injection pressure drop during liquid quench of solid rocket motor. The critical value of injection pressure drop increases with propellant energy (gy). The additive selected appropriately added in liquid is able to reduce significantly the liquid quantity required (LQR) Ws, for extinction of solid rocket motor. LQR reduced by the addition of 0.5% CE by weight in water are about 35 and 25% for double base propellant and nonmetalized polyurethane-ammonium perchlorate composite propellant, respectively. LQR is mainly dependent upon the propellant energy, i.e., it increases with increasing propellant energy. For pure water, Ws * O.lg^and for water + 0.5% CE, Ws * 0.76gy* The variation of LQR with the chamber pressure is related to pressure exponent of propellant (n). If n > 0, it increases with increasing chamber pressure; and if n < 0, it decreases with increasing chamber pressure. With the injection pressure drop increasing, LQR decreases and the depressurization rate of solid rocket motor increases, respectively. The experimental results and the analysis indicate that the theoretical study on liquid quench of solid rocket motor should include the coupling effects of transient burning of propellant, heat transfer of liquid jet impinged on burning surface, evaporation of liquid droplets, and internal ballistics of rocket motor.

International audience; The effect of melt mixing on the interaction between multi-walled carbon nanotubes (MWNTs) and polystyrene (PS) matrix has been investigated. The interaction between pristine MWNTs and PS in solution was found to exist but not strong enough to allow MWNTs to be soluble in solvent. In contrast, this interaction between MWNTs and PS was significantly enhanced by melt mixing, which led to increased amount of PS-functionalized MWNT exhibiting good solubility in some solvents. The mechanism of melt mixing on this enhanced interaction was attributed to both chemical bonding and physical interaction during the melt mixing.

The influence of well-dispersed nano-clay filler on the morphology of thermotropic liquid crystalline polymer (TLCP) in nylon-6 matrix was investigated by melt extrusion process. The good dispersion of clay in the hybrid blends was confirmed by X-ray diffraction, transmission electron microscopy and rheological measurement. Morphological observation showed that the clay platelets had dramatic influences on the dispersion and deformation of TLCP phase. The TLCP droplets got smaller at the clay content ≤3 wt%, and deformed into fibrils at the clay content up to 5 and 7 wt%. The morphology evolution of TLCP in the hybrid blends, especially at 7 wt% of clay loading, was consistent well with the prediction based on the micro-rheology parameters such as the viscosity ratio of the dispersed phase to the matrix ( η d /η m ) and the ratio of capillary number to the critical capillary number (Ca/Ca crit ). This enhanced fibrillation of TLCP droplets was attributed to the role of nano-clay particles as a compatibilizer to improve the interfacial adhesion and to suppress the interfacial slip between TLCP and nylon phases in the melt, so that the shear stress was effectively transferred to the dispersed TLCP phase.

The Si3N4 ceramic reinforced with 30 wt% 3YZrO2(ZrO2 containing 3 mol%Y2O3 has been fabricated by two kinds of processes (hot press and presureless sintering). The ZrO2/Si3N4 composites exhibited a high fracture toughness and flexural strength, and lower thermal conductivity than Si3N4 matrix material. The ZrO2/Si3N4 composite is suggested to be a very hopeful candidate material as component of heat engine applications. In this paper, the microstructure and phase composition of the composites are studied by SEM and XRD. The toughening mechanism of ZrO2 in the ZrO2/Si3N4 composites is discussed.

Si3N4 composite piston cap is made of Si3N4 matrix adding Y2O3, TiC and A12O3. The microstructure of Si3N4 composite shows α —Si3N4 and whisker-like β —Si3N4 grains homogeneously distribute in the matrix. The second phase particles are spread in the α —Si3N4 grains. The reinforced mechanism of two phases is discussed. The Si3N4 composite piston cap has been worked for over 100 hrs at over 800 °C for 1500 r/min during the high or full power run without water cooling. Experimental results show two phases microstructure gives the high mechanical properties which can make the resistance to thermal shock and high temperature.

In-situ hybrid composites containing matrix polycarbonate, glass fiber and LCP are prepared. The morphology of LCP and the rheological behavior of the composites are described. The relationship between flowability and morphology is discussed. It is interesting to find that in some hybrid systems, composites containing more glass fiber have better flowability than composites containing less glass fiber. Glass fiber aspect ratio is an important factor that determines the flowability. Materials with short glass fiber have lower viscosities than the materials with long glass fiber. LCP morphology is another important parameter that determines the flowability of the composites. If LCP forms fibrils, the composites have better flowability. If spheres dominate the morphology of LCP, the materials have larger viscosity. The addition of glass fiber brings about new factors that influence the morphology of LCP. The LCP morphology is not only affected by LCP content, but also by glass fiber content and glass fiber length. LCP fibrils are promoted in some in-situ hybrid composites. A model is proposed to describe how fibrillation of LCP is promoted due to the addition of glass fiber.