季戊四醇四(3-巯基丙酸)酯／乙烯基硅氮烷体系光聚合反应动力学红外光谱法研究  

Study on the photopolymerization kinetics of thiol-vinyl silazane system by infrared spectrum method

作　　者：张教强[1] 陈少杰[1] 郭银明[1] 唐晓春[2] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710072 [2]兰州大学化学化工学院,甘肃兰州730000

出　　处：《应用化工》2008年第11期1285-1288,1294,共5页Applied Chemical Industry

基　　金：总装预研项目(NB600001)

摘　　要：用傅立叶变换红外光谱法研究了季戊四醇四(3-巯基丙酸)酯/乙烯基硅氮烷体系光聚合反应动力学,跟踪检测了巯基和乙烯基吸光度的变化,测定了光聚合反应过程的巯基和乙烯基的转化率,发现巯基与乙烯基以化学计量比1∶1反应。在巯基和乙烯基物质的量相等和乙烯基过量的情况下,按照一级反应处理的动力学数据都得到较好的线性关系,且反应速率与巯基浓度的一次方成正比。The Fourier transform infrared spectrometry was used to monitor the conversion of both thiol and vinyl functional groups independently during the photopolymerizing reaction of ceramic precursor monomer PSN-1 with pentaerythritol tetra（3-mercaptopropionate） ,and which was also used to investigate the reaction dynamics. The results indicated that the stoichiometric ratio of thiol to vinyl during the polymerization reaction was 1 ： 1. When the quantity （molar） of thiol and vinyl was the same or the latter was superfluous, and the dynamic data were simulated according to the first order reaction model, then a preferable linear relation of the kinetic ones were obtained, further more, the reaction rate was proportional to one power of the concentration of the thiol group.

关 键 词：光聚合 反应动力学 红外光谱 

分 类 号：TP274.52[自动化与计算机技术—检测技术与自动化装置] TP801[自动化与计算机技术—控制科学与工程]