摘要
以环戊二烯基异丙苯铁六氟磷酸盐为光引发剂，用等温差示扫描量热法（ＤＳＣ）研究了对甲苯基缩水甘油醚（ＣＧＥ）的光引发阳离子聚合的温度效应及聚合反应动力学。研究表明ＣＧＥ聚合时，反应速率及最终转化率随温度变化在５５０℃及４５０℃左右有一个峰值．ＣＧＥ光聚合反应速率与单体浓度的一次方成比例，其反应机理包括两个基本反应，即：引发剂光解产物与单体的配合反应以及在该配合物中单体的开环反应，而这两个反应具有相反的温度效应，升高温度有利于后者而不利于前者．
The polymerization kinetics and temperature effect on photoinduced cationic polymerization of p-cresylglycidylether(CGE)initiated with cyclopentadienyl-cumene-iron hexaflu-orophosphate was studied using isothermal DSC method.It is shown that the polylnerization rate and ultimate conversion are the maxima at around 55℃and 45 ℃, respectively.The polymerization rate of CGE is proportional to CGE concelitration. Two basic reactionsare involved in the polymerization process,i.e., the complexation of the photolytic productof photoinitiator with the monomer and the ring-opening reaction of monomer startingfrom the complex formed.The temperature effect on these two reactions is opposite,i.e.,higher temperature is favorable for the latter but disadvantageous for the former.
出处
《感光科学与光化学》
CSCD
1994年第2期140-146,共7页
Photographic Science and Photochemistry
基金
国家自然科学基金
关键词
光引发
对甲苯基
光聚合
甘油醚
iron-arene complex photoinitiator,epoxide,photoinduced cationicpolymerization,kinetics To whom correspondence should be addressed.
