中文摘要：

报道了一种从引发型单体CX（inimer）出发、通过负离子-RAFT机理转换,制备两亲性高度支化聚合物的方法.首先,用仲丁基锂（s-Bu Li）与双官能团的1,1-二苯基乙烯衍生物MDDPE反应制备inimer,并通过inimer与苯乙烯共聚制备高度支化聚苯乙烯活性负离子;然后将末端负离子通过与CS2和1-溴乙基苯反应,原位转化为双硫酯基团,并作为大分子链转移剂（dendritic-CTA）调控N-异丙基丙烯酰胺（NIPAM）聚合,从而得到含聚苯乙烯（PS）和PNIPAM的两亲性支化嵌段共聚物.用联有光散射的凝聚色谱（GPC-MALLS）以及1H-NMR对产物进行了表征,并通过荧光探针、动态光散射（DLS）、透射电镜（TEM）等技术对两亲性支化嵌段共聚物在的溶液性质和乳化性能进行了研究.结果表明,该聚合物在水溶液中表现出独特的随温度变化的聚集行为,在水/油两相体系中具有极强的乳化能力.

英文摘要：

We developed a synthetic method for amphiphilic and highly branched block copolymers composed of polystyrene and poly（N-isopropylacrylamide）（PNIPAM） through copolymerization of an anionic inimer（synthesized from monoaddition of 1,3-bis（1-phenylvinyl）benzene（MDDPE） with s-butyllithium） and styrene, followed by mechanism transformation from living anionic to controlled radical polymerization based on reversible addition-fragmentation chain transfer process. The mechanism transformation was achieved on the basis of conversion of living anionic species into thiocarbonylthio moieties by sequential reaction with CS2 and 1-phenylethyl bromide, affording a dendritic chain transfer agent（Dendritic-CTA）. The resulting Dendritic-CTA was further employed to mediate RAFT polymerization of NIPAM to give amphiphilic and highly branched block copolymer. A series of amphiphilic and highly branched block copolymers were thus prepared by changing the feed ratio of NIPAM to Dendritic-CTA. The successful formation of Dendritic-CTA was confirmed by ultraviolet spectrum（UV）, the structures of the Dendritic-CTA and the highly branched amphiphilic block copolymers were further characterized by 1H nuclear magnetic resonance（1H-NMR）, gel permeation chromatography（GPC） equipped with multiangle laser light scattering detector. The solution properties of the highly branched amphiphilic block copolymers were investigated by fluorescence emission spectra（using nile red as the fluorescent probe）, dynamic light scattering（DLS）, and transmission electron microscopy（TEM）. The fluorescence results show that the amphiphilic highly branched polymers have a low critical aggregation concentration（CAC） around 0.0035 mg/m L, and a temperature dependent multistage aggregation of the products in water was observed in the test of DLS. The DLS results also showed that the amphiphilic and highly branched block copolymers could form micelles with Rh size of 135 nm in water; the TEM results further illustrated