聚氨酯改性环氧树脂的制备及红外光谱分析  

Preparation and FT-IR analysis of the epoxy modified by polyurethane

作　　者：李芝华[1] 任冬燕[1] 丑纪能[1] 谢科予[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《热固性树脂》2006年第1期8-11,共4页Thermosetting Resin

摘　　要：制备了聚氨酯改性环氧树脂体系,并通过红外光谱分析,研究了异氰酸酯端基的聚氨酯预聚体、扩链剂、环氧树脂及其固化剂之间相互反应的规律。结果表明,聚氨酯、环氧树脂二者之间形成IPN结构过程中,环氧树脂与其固化剂之间发生固化反应;扩链剂1,4-丁二醇对PU预聚体进行扩链;同时TDE-85同PU预聚体之间还发生两相间的化学反应,这可有效地提高2种聚合物之间的相容性和稳定性,从而可以提高环氧树脂性能,达到改性目的。In this paper, the epoxy resin system modified by polyurethane was prepared, and the multi- reaction mechanism between the PU monomer, chainextended reagent and curing agent was discussed by the FTIR examination. The results indicated： in the IPN formation process , curing reaction could be found between the epoxy resin and the curing agent, and the 1, 4 butanediol extended the chain of PU prepolymers, meanwhile, there were also the two- phase chemical reaction between the TDE - 85 and the PU prepolymers could be found, which might further enhance the compatibility and stability of two polymers , so the attributes of epoxy resin could be improved and the goal of modification could be successfully attained.

关 键 词：聚氨酯 环氧树脂 改性 红外光谱 固化机理 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]