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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14766
Title: Liquid silicone rubber vulcanizates: Network structure-property relationship and cure kinetics
Authors: Rajesh G.
Maji, Pradip K.
Bhattacharya M.
Choudhury A.
Roy N.
Saxena A.
Bhowmick A.K.
Published in: Polymers and Polymer Composites
Abstract: Liquid silicone rubber (LSR) vulcanizates have been prepared from vinyl-end capped polydimethylsiloxane (PDMS) and polymethylhydrogenosiloxane (PMHS) in presence of platinum catalyst using solution casting technique. The science involving synthesis of usable silicone rubber by curing with polymethylhydrogenosiloxane has been studied in details. The effects of vinyl content of PDMS and the ratio of hydride crosslinker to vinyl concentration on crosslink density, mechanical, dynamic-mechanical and thermal properties have been discussed. It has been found that at optimum level of crosslinker, the LSR vulcanizate shows a maximum crosslink density with highest improvement in mechanical and thermal properties. The amount of crosslinker required, depends upon the number of vinyl functionality per unit length of the polymer chain and the chemical composition of the hydride crosslinker. This study makes a novel attempt to determine cure kinetics of PDMS by using Fourier Transform Infrared spectroscopy. Measurements have been done at three different temperatures and found to follow the first order reaction with respect to consumption of vinyl (C=C) and silyl hydride groups (Si-H). The activation energy and kinetic parameters have been determined as well. © Smithers Rapra Technology, 2010.
Citation: Polymers and Polymer Composites (2010), 18(9): 477-488
URI: https://doi.org/10.1177/096739111001800902
http://repository.iitr.ac.in/handle/123456789/14766
Issue Date: 2010
Publisher: Smithers Rapra
ISSN: 9673911
Author Scopus IDs: 57214506528
56249287900
25026143700
8429397800
57197925430
7401482472
26643264700
Author Affiliations: Rajesh, G., Rubber Technology Centre, Indian Institute of Technology, Kharagpur-721302, India
Maji, P.K., Rubber Technology Centre, Indian Institute of Technology, Kharagpur-721302, India
Bhattacharya, M., Rubber Technology Centre, Indian Institute of Technology, Kharagpur-721302, India
Choudhury, A., Rubber Technology Centre, Indian Institute of Technology, Kharagpur-721302, India
Roy, N., Rubber Technology Centre, Indian Institute of Technology, Kharagpur-721302, India
Saxena, A., Momentive Performance Materials Programs, General Electric India Technology Centre, Whitefield Road, Bangalore-560066, India
Bhowmick, A.K., Rubber Technology Centre, Indian Institute of Technology, Kharagpur-721302, India, Indian Institute of Technology, Patna - 800013, India
Corresponding Author: Bhowmick, A. K.; Indian Institute of Technology, Patna - 800013, India; email: anilkb@rtc.iitkgp
Appears in Collections:Journal Publications [PE]

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