【摘要】 以氯化亚铜(CuCl)/2′,2″,2″-三氨基三乙基胺(Me6TREN)为催化体系,氯苯为溶剂,α-溴代异丁酰溴封端的PEO(PEO-Br)为大分子引发剂,采用原子转移自由基聚合(ATRP)法合成了由聚氧化乙烯(PEO)和聚酯化羧基螺吡喃(PSPMA)组成的两亲性PEO-b-PSPMA嵌段共聚物,并将其在水相中配制成胶束。采用GPC1、H-NMR、AFM、DLS及UV-Vis等手段研究了嵌段共聚物及其胶束。结果表明:选择适当的反应物配比和反应时间能够合成分子量适中、窄分子量分布的PEO-b-PSPMA,而且其在水溶液自组装成的球形胶束具有可逆光致变色性能。更多还原

【Abstract】 Poly(ethylene oxide)-b-poly(2-(3-(3’,3’-dimethyl-6-nitrospiro(indoline-2’,2-benzopyran)-1′-yl)propanoyloxy)ethyl methacrylate)(PEO-b-PSPMA)was prepared by atom transfer radical polymerization(ATRP) using CuCl/tris[2-(dimethylamino)ethyl] amine(Me6TREN) as catalyst and PEO-Br as a macroinitiator in the solvent of chlorobenzene,and formed micelles in water by self-assembly.The diblock copolymer and its micelles were characterized by GPC,1H-NMR,AFM,DLS and UV-Vis.The results showed that the well-defined amphiphilic diblock copolymer PEO-b-PSPMA was prepared by chosing the right percentage of reactant and reaction time.PEO-b-PSPMA can form spherical micelle in water solution by self-assembly,and the micelle solution was reversibly photochromic.更多还原