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论文类型：期刊论文

发表时间：2013-08-12

发表刊物：MACROMOLECULAR CHEMISTRY AND PHYSICS

收录刊物：SCIE、EI、Scopus

卷号：214

期号：15

页面范围：1677-1687

ISSN号：1022-1352

关键字：amphiphiles; amorphous crystalline copolymers; anionic polymerization; graft copolymers; ring-opening polymerization

摘要：An amphiphilic polymer brush with PB and PEO side chains is prepared by combined "grafting-onto" and "grafting-from". The linear and star-shaped heterografted copolymer synthesized is of controlled molecular weight and has a narrow molecular weight distribution ((M) over bar (w)/(M) over bar (n) < 1.2). A DSC study of this heterografted copoly mer containing crystalline and amorphous chains shows that it displays "fractionated crystallization" behavior. The study on isothermal crystallization kinetics of the copoly mer is carried out in isothermal step crystallization (ISC) experiments, in which two crystallization exothermic peaks at low temperatures are observed. The critical micelle concentration (cmc) of the amphiphilic brush polymer in an aqueous solution is determined by a fluorescence technique. The results show that this amphiphilic brush forms aggregates in the system.