含1,3,5-三嗪结构聚芳醚高性能聚合物的合成

1,3,5-三嗪基聚合物具有优异综合性能,但传统1,3,5-三嗪基聚合物难溶解、难熔融,通常在高温高压下才能制得高分子量聚合物,限制了其在分离膜、绝缘漆和粘合剂等领域的应用。文中基于分子设计理论,分别在聚合物分子链中引入柔性侧基、非对称性结构、扭曲或扭曲非共平面结构等,合成了系列既耐高温又可溶解的含1,3,5-三嗪结构新型聚芳醚高性能聚合物,探讨了分子结构等对聚合物溶解性、热性能和力学性能间影响规律。

Preparation of Heat-Resistant Poly(Aryl Ether)s Containing 1,3,5-Triazine Moieties

1,3,5-Triazine-based polymers are well-known for their outstanding comprehensive properties including excellent thermal stability,high strength and modulus,good flame retardance and chemical resistance.However,such polymers always exhibit high melt or infusion temperatures together with poor solubility,and high-molecular-weight polymers are frequently prepared at high temperature under high pressure,which hamper their wide spread utilization as high-performance separation membranes,insulting coatings or sealants.By using molecular design,new series of soluble and heat-resistant poly(aryl ether)s containing 1,3,5-triazine moieties were prepared by the incorporation of flexible pendant groups,unsymmetrical units,kink or twisted non-coplanar moieties into the polymer chain.The effect of molecular structure on polymer solubility,thermal stability and mechanical strength was investigated in this paper.