天然氨基酸作用下2,2-二甲基三亚甲基碳酸酯的开环聚合

Ring Opening Polymerization of 2,2-Methyl Trimethyene Carbonate Initiated by Natural Amino Acid

研究了几种中性天然氨基酸存在下2,2-二甲基-三亚甲基环碳酸酯(DTC)的开环聚合反应。1H-NMR和端基滴定分析表明,在聚合反应过程中,DTC上的酰氧键断裂,氨基酸通过氨基接在聚(2,2-二甲基-三亚甲基碳酸酯)链上。3-氨基丙酸、4-氨基丁酸、6-氨基己酸等存在时,DTC的聚合反应也可以发生,但单体的转化率和聚合物的分子量低于天然氨基酸引发的聚合反应。

Ring opening polymerization of 2,2-methyl trimethyene carbonate（DTC） in the presence of neutral amino acids was studied in detail.（）^（）~1H-NMR and titration demonstrate that during the reaction,the acyloxygen bonds in DTC molecule rupture and amino groups incorporate into the PDTC.Ring opening polymerizations of DTC in the presence of 3-amino propionic acid,4-amino butyric acid,and 6-amino（caproic） acid also can take place.DTC conversion and molecular weight of PDTC are less than those with（natural） amino acids.