摘要
采用预聚体法制备了端羟基聚丁二烯(HTPB)型聚氨酯弹性体,并采用了化学改性的方法对HTPB型聚氨酯弹性体进行了改性研究。结果表明:以分子量为3100的HTPB作软段,2,4-甲苯二异氰酸酯(TDI)作硬段,预聚体中-NCO的含量控制在4.5%～5.0%之间,双酚A型环氧树脂(E-51)占25%时,弹性体材料的力学性能和耐水性能最好。
The HTPB polyurethane elastomer is synthesized by the method of prepolyrner,and then is modified by chemical technique. The results indicate that the mechanical and water-resistant properties of the polyurethane elastomer material are the best when it is prepared with hydroxyl-terminated polybutadiene 3100 as soft segment, 2,4- toluene diisocyanate as hard segment,and the ratio of -NCO is between 4. 5%~5.0%,moreover the content of E-51 is 25 % of prepolymer.
关键词
聚氨酯弹性体
改性
力学性能
耐水性
polyurethane elastomer,modification, mechanical property,water-resistant capability
