Synthesis of starlike PtBA-g-PEO amphiphilic graft copolymer via highly efficient Cu-catalyzed SET-NRC reaction at ambient temperature
作者:Yaogong Li、Yaqin Zhang、Sujuan Zhai、Yan Deng、Huiming Xiong、Guolin Lu、Xiaoyu Huang
DOI:10.1002/pola.24392
日期:2011.1.1
(TEMPO) group using copper/N,N,N′,N′,N″‐pentamethyldiethylenetriamine as catalytic system at ambient temperature via grafting‐onto strategy. The critical micelle concentration values of the obtained amphiphilic star graft copolymers in aqueous media and brine were determined by fluorescence probe technique using pyrene as probe. Diverse micellar morphologies were formed by varying the content of hydrophilic
通过顺序可逆加成断裂链转移(RAFT)聚合和单电子转移-合成了两种具有疏水性聚丙烯酸叔丁酯主链和亲水性聚环氧乙烷(PEO)侧链的新型两亲星形接枝共聚物氮氧化物自由基偶联(SET-NRC)反应在温和条件下进行。用四臂链转移剂以受控方式介导2-((2-溴丙酰氧基)甲基)丙烯酸叔丁酯的RAFT均聚反应,从而提供分子量分布窄(M w / M n = 1.26)。目标聚(丙烯酸叔丁酯)g-PEO(P吨BA-克-PEO)星形接枝共聚物是由SET-NRC反应之间合成BR-含P吨基于BA-星形主链和PEO一端与2,2,6,6-四甲基哌啶-1-氧基官能(TEMPO)组使用铜/ N,N,N ',N ',N”-五甲基二亚乙基三胺在室温下通过接枝策略作为催化体系。以pyr为探针,通过荧光探针技术测定了所得两亲星形接枝共聚物在水性介质和盐水中的临界胶束浓度。通过改变亲水性PEO链段的含量以及原液的初始浓度,形成了多