The optimal conditions were obtained.The thermogravimetry showed that PMS was possessed of excellent heat weight loss ratio of PMS was 4% at 700 .

• 研究了水解温度、溶剂、水与单体的摩尔比、缩聚温度、缩聚时间以及胺的结构对产物性能的影响，获得了最佳的合成条件。