非异氰酸酯聚氨酯的增韧改性

Toughening modification of non-isocyanate polyurethane

以双酚A环氧树脂（E51）与CO_2为原料合成五元环状碳酸酯（E51–5CC）,通过脂肪族环氧树脂改性的E51–5CC与端氨基聚醚和二乙烯三胺反应制备非异氰酸酯聚氨酯（NIPU）。通过环氧值、力学性能测定和红外光谱、动态力学分析,分别考察了使用脂肪族环氧树脂改性的E51–5CC和使用端氨基聚醚与高活性胺共同作为固化剂对合成NIPU的影响。结果表明：使用脂肪族环氧树脂TTA–26改性的E51–5CC,NIPU的韧性得到很大提高;端氨基聚醚单独作为固化剂时反应活性太低,且交联度不够,使NIPU强度偏低,端氨基聚醚与二乙烯三胺共同作为固化剂使用时合成NIPU的综合性能得到很大改善。

The five-member cyclic carbonate （E51-5CC） was synthesized by using bisphenol A type epoxy resin （E51） and CO2 as raw materials. The non-isocyanate polyurethane （NIPU） was prepared by the reaction of aliphatic epoxy resin modified E51-5CC with amino-terminated polyether and diethylene triamine. The influence of using ali- phatic epoxy resin modified E51-5CC and using amino-terminated polyether and high active amine together as curing agents on the synthesis of NIPU was respectively investigated by epoxy value and mechanical performance determina- tion, infrared spectrum and dynamic mechanical analysis. The results show that the toughness of the NIPU obviously increases by using aliphatic epoxy resin TTA26 modified E51-5CC. When amino-terminated polyether alone is used as curing agent, the reaction activity is too low, and the crosslinking degree is insufficient, the obtained NIPU possesses low strength. When amino-terminated polyether and diethylene triamine together are used as curing agents, the com- prehensive performance of the synthesized NIPU can be significantly improved.