Abstract: Dicyclopentadiene dioxide epoxy (DCPDE) resin was modified by polyurethane (PU) grafting interpenetrating polymer networks (IPNs) based on copolymer (CPMI-co-EMDCPE) as curing agent in order to increase the thermal stability and compatibility of PU/DCPDE IPNs，which was started from N-(p-carboxyphenyl) maleimide (CPMI) and ethylene glycol monodicyclopentenylether (EMDCPE) monomers. Infrared spectral analysis was used to characterize the chemical structures of the copolymer and the IPNs. The mechanical properties，thermal stability and morphology of the resulted coatings were also investigated. The results indicated that the formation of DCPDE/PU IPNs increased flexibility，traction and strike of resulted coatings according to their nature and percentage concentration. The incorporation of copolymers (CPMI-co-EMDCPE) as curing agent into the polyurethane modified dicyclopentadiene dioxide epoxy resin universally increased thermal stability of DCPDE/PU IPNs. Surface morphology of modified dicyclopentadiene dioxide epoxy resin investigated by scanning electron microscopy (SEM) showed that modified DCPDE resin exhibited heterogeneous morphology.

摘要： ：以N-对羧基苯基马来酰亚胺（CPMI）和乙二醇单双环戊二烯基醚（EMDCPE）为单体合成了新型共聚物（CPMI-co-EMDCPE），将其作为二氧化双环戊二烯环氧树脂（DCPDE）/聚氨酯（PU）互穿聚合物网络（IPNs）体系的固化剂，以期改善互穿聚合物网络之间的相容性和热性能。采用红外光谱法对固化剂及互穿聚合物网络的结构进行表征。对不同固化体系涂膜的热稳定性、力学性能和微观形貌进行了研究。研究表明，互穿聚合物网络的形成，提高了二氧化双环戊二烯环氧树脂的弯曲强度、附着力和抗冲击强度。新型固化剂的加入普遍提高了二氧化双环戊二烯环氧树脂/聚氨酯互穿聚合物网络的耐热性能，增韧改性后的环氧树脂呈现明显的两相结构。