828环氧树脂体系电子束固化反应机理的研究  

RESEARCH ON ELECTRON BEAM CURING REACTION MECHANISM OF 828 EPOXY SYSTEM

作　　者：隋刚[1] 仲伟虹[1] 张佐光[1] 胡刚[1] 李凤梅[2] 

机构地区：[1]北京航空航天大学材料科学与工程系,北京100083 [2]北京师范大学低能核物理研究所,北京100875

出　　处：《高分子材料科学与工程》2002年第4期49-52,56,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学重点基金资助项目 (5 9833110 )

摘　　要：对电子束 (EB)辐射 82 8环氧树脂的固化反应机理进行了研究 ,考察了不同引发剂、稀释剂对树脂体系辐射反应的影响。实验发现 ,阳离子型光引发剂可以引发环氧树脂的电子束辐射固化反应 ,传统的热固化体系并不适用于电子束固化 ,稀释剂的使用会降低反应体系的固化度 ,其中活性稀释剂的影响较小 ,供电子型溶剂会对环氧树脂的辐射固化反应起阻聚作用。以环氧丙烷作为单官能团环氧模型化合物 ,采用红外光谱、自由基捕捉技术与气相色谱 -质谱相结合的方法 ,研究了电子束辐射环氧丙烷 -碘金翁盐体系的辐射反应机理 ,推导出由碘金翁盐在电子束辐照下分解 ,随后产生质子酸 ,引发环氧丙烷阳离子开环聚合的反应过程。The electron beam(EB) curing reaction mechanism of epoxy resin was studied in this paper. The effect of different initiator and diluent on radiation reaction was investigated, and radiation reaction systems were also researched using heating treatment. The experimental results indicated cationic photoinitiator can initiate EB radiation curing of epoxy resin, and traditional thermal cure system was unsuited for EB curing. For thermal stability of diaryliodonium salts, thermal initiation effect in EB curing process was negligible. The use of diluent would reduce the curing degree of resin and reactive diluent had less effect, but electron donating solvent can inhibit from radiation curing of epoxy resin. The IR, ESR, GC MS were combined to study radiation reaction mechanism of epoxy resin by using epoxy propane as model compound of single epoxy functional group. Lastly, the cation ringopening polymerization process including diaryliodonium salts decomposition under EB radiation in the first instance and production of protonic acid that can initiate polyreaction was deduced.

关 键 词：828环氧树脂体系 电子束 固化反应机理 研究 辐射固化 引发剂 稀释剂 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]