摘要
对4种不同官能度的环氧树脂在紫外光辐照下用一种二苯基碘钅翁盐或两种二烷基苯甲酰锍盐光引发剂进行阳离子光固化的体系作了系统的研究。研究结果表明,二氨基二苯甲烷环氧树脂AG-80不能阳离子光固化,而E-51,711和TDE-85均可在二苯基碘钅翁六氟磷酸盐或1-甲基-1-十二烷基苯甲酰甲基六氟锑酸锍盐作用下进行紫外光引发阳离子聚合,其中二苯基碘钅翁六氟磷酸盐引发E-51环氧树脂阳离子光固化的效果最好,该树脂体系可用做紫外光固化复合材料的树脂基体。研究还发现,在停止紫外光辐照后,由于阳离子聚合链终止困难而使碘钅翁盐引发的环氧树脂光固化体系存在后固化现象,后固化速度与后固化时的温度有关。
The photoinitiated cationic polymerizations of epoxy resins with different functionality (E51,711,TDE85 and AG80)were investigated in the presence of one diphenyliodonium or two kinds of dialkylphenacylsulfonium salt photoinitators.The results showed that the photoinitiated cationic ringopenig polymerization of the epoxy resin AG80 was not be observed.Other epoxy resins could undergo photopolymerization at different rates,and the photoinitiated cationic polymeriation of bisphenolA type epoxide oligomers E51 with diphenyliodonium salt was much more effective than other initiators.Because the chain termination was difficult in cationic polymerization,the photoinitiated epoxy resin systems using iodonium salt would continue to cure even after the UV light had been turned off.
出处
《热固性树脂》
CAS
CSCD
2003年第3期4-6,共3页
Thermosetting Resin
基金
航天技术创新基金资助项目。
关键词
环氧树脂
紫外光固化
阳离子光固化
碘鎓盐
铳盐
epoxy resin
UV curing
photoinitiated cationic polymerization
iodonium salt
sulfonium salt
