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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。
The catalytic effect of CuCl / 2 ’, 2’ ’, 2’ ’- triaminotetramine (Me6TREN) as catalyst system, chlorobenzene as solvent and α-bromoisobutyryl bromide terminated PEO (PEO- Br) as a macroinitiator, an amphiphilic PEO-b-PSPMA block composed of polyethylene oxide (PEO) and polyesterified carboxyl spiropyrans (PSPMA) was synthesized by atom transfer radical polymerization (ATRP) Copolymer, and formulated into a micelle in the aqueous phase. The block copolymers and their micelles were investigated by GPC1, H-NMR, AFM, DLS and UV-Vis. The results show that PEO-b-PSPMA with moderate molecular weight and narrow molecular weight can be synthesized by selecting the appropriate ratio of reactants and reaction time, and the spherical micelles self-assembled in aqueous solution have reversible photochromic properties.