环氧改性水性聚氨酯的结构分析与表征  

Structural Analysis and Characterizations of Water-borne Polyurethane Modified by Epoxy Resin

作　　者：邓朝霞[1] 叶代勇[1] 黎永津[1] 陈焕钦[1] 

机构地区：[1]华南理工大学化工与能源学院化工研究所,广州510640

出　　处：《绝缘材料》2007年第2期14-16,20,共4页Insulating Materials

基　　金：粤港关键领域重点突破项目招标课题(B10-B2050260)

摘　　要：以甲苯二异氰酸酯(TDI-80)、聚醚二醇(N220)、二羟甲基丙酸(DMPA)、环氧树脂和丙烯酸羟丙酯(HPA)为主要原料,合成了环氧改性的水性聚氨酯乳液。通过傅立叶变换红外光谱、粒径分析仪、凝胶渗透色谱(GPC)和透射电镜(TEM)对乳液进行了结构分析与表征。傅立叶变换红外光谱和透射电镜分析结果表明,环氧树脂已接枝到水性聚氨酯分子上,且环氧树脂的羟基和环氧基全部参与了发应。凝胶渗透色谱分析表明环氧树脂改性水性聚氨酯提高了聚氨酯的分子量。The water-borne polyurethane （WPU） emulsion modified by epoxy resin was prepared using toluenediisocyanate （TDI）, polyether （N220）, dimethylolpropionic acid （DMPA）, epoxy resin, hydroxypropyl acrylate （HPA） and so on. The structure of WPU emulsion was analyzed and characterized by FT-IR, Malvern particle size analyzer, GPC and TEM. The results analyzed by FT-IR and TEM show that the epoxy resin has been grafted to the water-borne polyurethane and the epoxy groups and hydroxyl of the epoxy resin are all taken part in the reaction. The GPC measuring found that the molecular weight of WPU modified by epoxy resin ishigher than that of WPU.

关 键 词：水性聚氨酯 改性 环氧树脂 表征 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业] TQ323.5