文献类型：期刊文献

英文题名：Improved tensile strength of acrylonitrile-butadiene rubber/anhydrous copper sulfate composites prepared by coordination cross-linking

作者：Shao, Chengli[1];Mao, Yapeng[1];Shang, Peng[1];Li, Qiuying[1];Wu, Chifei[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Preparat & Applicat Ultrafine Mat, Minist Educ,Polymer Proc Lab, Shanghai 200237, Peoples R China

年份：2019

卷号：76

期号：3

起止页码：1435

外文期刊名：POLYMER BULLETIN

收录：;EI(收录号：20183105619731);WOS:【SCI-EXPANDED(收录号:WOS:000459515600021)】；

语种：英文

外文关键词：Milling (machining) - Rubber - Butadiene - Glass transition - Copper compounds - Acetone - Ball milling - Crosslinking - Tensile strength

摘要：Acrylonitrile-butadiene rubber (NBR)/anhydrous copper sulfate (CuSO4) composites were prepared by coordination cross-linking. CuSO4 particles of different sizes are obtained by ball milling in acetone. During heat pressing at 190 degrees C, a strong cross-linking reaction occurred, which resulted from coordination between cupric ions and nitrile groups. Results showed that the mean size of CuSO4 particles decreased from 7.1 to 0.4m after ball milling. Accordingly, the number of coordination cross-linking points increased remarkably, which resulted in an increase in the glass transition temperature and equilibrium torque of the composites. Two models were employed to discuss the cross-link density and demonstrated that both CuSO4 particles and cupric ions contributed to the improvement of cross-linking points. It was noteworthy that this composite exhibited high strength and toughness, with 73.5MPa tensile strength and 423.7% elongation at break. Moreover, a unique stretching phenomenon, including the features of both rubber and plastic, was observed and explained in detail.