文献类型：期刊文献

英文题名：Investigation on crosslinking behaviors of NBR/PVC filled with anhydrous copper sulfate particles by dynamic mechanical analysis

作者：Shen, Fei[1]; Yuan, Xiaofang[1]; Wu, Chifei[1]

机构：[1] Polymer Alloy Laboratory, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2007

卷号：45

期号：1

起止页码：41

外文期刊名：Journal of Polymer Science, Part B: Polymer Physics

收录：EI(收录号：20070410384057)

语种：英文

外文关键词：Activation energy - Copper compounds - Crosslinking - Dynamic mechanical analysis - Fourier transform infrared spectroscopy - Isotherms - Phase equilibria - Polyvinyl chlorides - Swelling

摘要：Crosslinking behaviors of acrylonitrile butadiene rubber (NBR)/poly (vinyl chloride) (PVC) alloy, filled with anhydrous copper sulfate (CuSO4) particles, were investigated for the first time by dynamic mechanical analysis (DMA) under hetero and isothermal modes, respectively. In the heterothermal testing, (NBR/PVC)/CuSO4 compound showed two marked increases in the storage modulus (E′), corresponding to coordination crosslinking of NBR-CuSO4 and self-crosslinking of NBR and PVC respectively. During the isothermal testing, a dramatic increase in E′ was found at the initial stage while that of original NBR/PVC alloy was not detected. The marked increase in E′ of (NBR/PVC)/CuSO4 compound was mainly due to the crosslinking induced by coordination between -CN and Cu2+. The increasing extent of E′ increased with the rise of CuSO4 content, suggesting the formation of a greater number of crosslinks. Moreover, the activation energy (Ea) of crosslinking process was about 139 kJ/mol. In this work, fourier transform infrared spectrum (FT-IR) and equilibrium swelling method were also performed for the characterization of the compound. ? 2006 Wiley Periodicals, Inc.