文献类型：期刊文献

英文题名：An in situ self-catalytic hybrid cyanate ester resin and its self-catalytic polymerization behavior

作者：Guo, Kangkang[1,2];Li, Ping[2];Zhu, Yaping[1];Wang, Fan[3];Qi, Huimin[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：6

期号：83

起止页码：80213

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20171403520399);WOS:【SCI-EXPANDED(收录号:WOS:000382539600108)】；

基金：The authors gratefully acknowledge the support of the National Science Foundation of China (Grant No. 51103038).

语种：英文

外文关键词：Fourier transform infrared spectroscopy - Esters - Catalysis - Differential scanning calorimetry - Dynamic mechanical analysis

摘要：A novolac cyanate ester (NCE) with self-catalytic function that incorporates -Si-NH-C N group has been synthesized through the reaction between methylvinylcyclotrisilazane (MVSZ) and novolac cyanate ester (NCE). The analysis of polymerization by in situ Fourier transform-infrared spectroscopy (FT-IR) reveal that the catalytic polymerization is dominated by the cyclotrimerization of -OCN and trimerization between NH-C N and -OCN, and the asymmetric and symmetric triazine ring were formed. The investigation of self-catalytic performance of O-Si-NH by differential scanning calorimetry (DSC) indicate that the O-Si-NH could significantly decrease the polymerization temperature, catalyze the polymerized reaction not only at lower temperature but also higher temperature even the limit from network structures, and endow the polymerized hybrid NCE with higher polymerized degree. Through dynamic mechanical analysis (DMA) analyses, it is concluded that the catalytic effect of -O-Si-NH- could improve the storage modulus and reduce the internal stress produced from polymerization process. The introduction of -Si-NH-C N to produce the catalytic effect for cyanate ester system is a promising method for modifying disadvantages of cyanate ester during polymerization.