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Your search keyword '"Yadaw, S. B."' showing total 6 results
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6 results on '"Yadaw, S. B."'

3. A Comparative Study of Reinforced-Polyurethane Foam Composite and Unreinforced Polyurethane Foam for Packaging.

Author

Singh, Vinay Pratap, Shukla, Sandeep, and Yadaw, S. B.

Subjects
URETHANE foam, COMPOSITE materials, COMPRESSIVE strength, THERMAL stability, COMPARATIVE studies, SCANNING electron microscopy
Abstract

In recent time many materials have been develop which are used for packaging applications. Here, a new type of composite for packaging has been developed consisting of hexagonal wire mesh as reinforced and rigid polyurethane foam as matrix material, which give high strength to weight ratio, good tensile and compressive strength. Tensile strength of reinforced-polyurethane foam composite (RPFC) is increased by 2.71 times and compressive strength is increased by 107% when compared with unreinforced polyurethane foam (UPF). Energy absorb by reinforced foam composite is 59.04% more than unreinforced one when drop test is performed. Reinforced-polyurethane foam composite (RPFC) can preferred for packaging where good surface hardness, thermal stability and controlling load-unload cycles is needed. As it show better results when tested by Shore D, DSC, TGA and Damping tests respectively. RPFC has good interfacial bonding between them as shown by scanning Electron Microscope (SEM) result. A comparative study of reinforced-polyurethane foam composite and unreinforced polyurethane foam has been done. Test results validation is done by using finite element methods ANSYSWorkbench14.5 and solidwork15. [ABSTRACT FROM AUTHOR]

Published
2016
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6. Ternary blends of acrylic rubber, poly(butylene terephthalate), and liquid crystalline polymer: Influence of interactions on thermal and dynamic mechanical properties

Author

Kumar, E. Shiva, Yadaw, S. B., Pandey, K. N., and Das, C. K.

Abstract

The ternary blends of acrylate rubber (ACM), poly(butylene terephthalate) (PBT), and liquid crystalline polymer (LCP) were prepared by varying the amount of LCP but fixing the ratio of ACM and PBT, using melt mixing procedure. The influence of interactions on thermal and dynamic mechanical properties of the blends was investigated over the complete composition range. The techniques applied were Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetry (TG), and dynamic mechanical analysis (DMA). The FTIR spectroscopy analysis showed reduction in the intensity of the peak corresponding to epoxy groups of ACM with increasing heating time at 290°C. This implies that there is a chemical reaction between the epoxy and end groups of PBT and LCP. Glass transition temperature (Tg) and melting temperature (Tm) of the blends were affected depending on the LCP weight percent in the ACM/PBT blend, respectively. This further suggests the strong interfacial interactions between the blend components. In presence of ACM, the nucleating effect of LCP was more pronounced for the PBT phase. The thermogravimetric study showed improved thermal stability for the blends with the increasing LCP content. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3904–3912, 2006

Published
2006
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