双羟基封端聚苯乙烯的阴离子法合成与表征

Living anionic polymerization possesses quick reaction rate, high selectivity and narrow molecular weight distribution of polymer, which can rapidly prepare target products. In this work, dihydroxy-terminated polystyrene (PS-(OH)2) was prepared via living anionic polymerization. The chemical structures and compositions, as well as the molecular weights and molecular weight distributions (PDIs) of the copolymers have been fully characterized by proton NMR, carbon NMR and GPC measurements. Firstly, ethoxyethyl glycidyl ether (EEGE) was produced by the reaction of glycidol and vinyl ethyl ether, proton and carbon NMR were used to verify the chemical structure; Then, living polystyrene anionic chain (PS-Li) was prepared by anionic polymerization with sec-butyl lithium as the initiator, and EEGE was used to react with PS-Li to produce PS-EEGE. The chemical structures and compositions, as well as the molecular weights and molecular weight distributions (PDIs) of the copolymers have been characterized by proton NMR and GPC measurements; Finally, the hydrolysis of PS-EEGE in the presence of HCl in THF yielded PS-(OH)2. GPC and MALDI-TOF MS were used to verify the chemical structures.