聚甲基三乙氧基硅烷水解缩合固化反应动力学研究  

Kinetic Study of Hydrolyzing Condensation and Curing of Polymethyl Triethoxysilane

作　　者：崔亚慧 江振林 郑钦超[1] 金亮 朱玮 焦俊峰 李唯真 Cui Yahui;Jiang Zhenlin;Zheng Qinchao;Jin Liang;Zhu Wei;Jiao Junfeng;Li Weizhen(School of Chemistry and Chemical Engineering y Shanghai University of Engineering Science,Shanghai 201620,China;Key Laboratory of High Performance Fibers and Products,Donghua University,Shanghai 201620,China;Wuxi Solead Technology Development Co.,Ltd.,Wuxi,Jiangsu 214253,China)

机构地区：[1]上海工程技术大学,化学化工学院,上海201620 [2]东华大学,高性能纤维与制品教育部重点实验室(B),上海201620 [3]无锡索力得科技发展有限公司,江苏无锡214253

出　　处：《涂料工业》2020年第9期12-16,共5页Paint & Coatings Industry

摘　　要：研究了聚甲基三乙氧基硅烷水解缩合以及固化反应的进程,通过水解反应过程中温度以及固含量的变化情况,选择合适的反应条件;通过研究反应制得的凝胶表面水接触角的变化情况,得出理想的缩合时间;最后应用原位升温红外观察缩合过程中聚硅氧烷的结构变化。结果表明:盐酸体系中水解速率最快,且酸性越强,水解速率越快;低温有利于硅氧烷单体水解完全,从而形成更稳定的结构;缩合固化过程中,存在着线型Si-O-Si结构向体型Si-O-Si结构转化,且固化温度越高,更有利于体形结构的形成,2种结构平衡所需时间越短。This paper described the hydrolysis condensation and curing reaction process of methyl triethoxy silane. Based on the change of temperature and solid content,in the process of hydrolysis reaction the optimized reaction conditions was determined. The ideal condensation time was finalized by studying the changes of the water contact angle on the obtained gel surface. The change of polysiloxane structure during condensation process was monitored by use of in-situ heating IR. The results showed that the hydrolytic rate in hydrochloric acid system was the fastest and the stronger the acid,the faster the hydrolytic rate and low temperature favored the completely hydrolysis of siloxane monomers,forming more stable structure. During condensation curing,there was a transformation from linear Si-O-Si structure to Si-O-Si network structure,and the higher the curing temperature,the more formation of network structure,and the shorter the time required for the balance of the two structures.

关 键 词：甲基三乙氧基硅烷 水解反应 缩合 固化 原位升温红外 

分 类 号：TQ630.1[化学工程—精细化工]