聚氨酯预聚体接枝环氧树脂的制备及固化性能研究  

Preparation and Curing Properties of Polyurethane Prepolymer Modified Epoxy Resin

作　　者：席尔莉[1] 俞中锋[1] 张泱泱[1] 申剑冰[1] 姚成[1] 

机构地区：[1]南京工业大学理学院,江苏南京210009

出　　处：《广东化工》2013年第17期17-18,共2页Guangdong Chemical Industry

摘　　要：采用分步法合成了聚氨酯(PU)预聚体/环氧树脂(E-51)接枝共聚物(g-PU/EP),以自制二聚酸聚酰胺为固化剂,对固化体系的固化性能进行了研究。结果说明:当PU预聚体/E-51质量比为20∶100时,固化体系的剪切强度(铝-铝)最大为14.1 MPa;SEM分析结果表明,接枝后固化物呈典型韧性断裂;TG分析表明,接枝改性对固化物耐热性的影响较小。PU prepolymer was used to graft epoxy resin（E-51） to obtain graft PU/EP. Self-made dimer acid based polyamide as a curing agent. Curing properties of cured product are studied. The result showed that shear strength was 14.1 MPa when PU prepolymer and E-51 using a mass ratios of 20：100; SEM showed the cured product happened ductile fracture： TG showed the toughening method has little effect on the heat-stability of cured product.

关 键 词：聚氨酯预聚体 环氧树脂 接枝改性 

分 类 号：TQ028.8[化学工程]