文献类型：期刊文章

作　　者：傅志峰[1] 刘海涛[1] 石艳[1] 焦书科[1]

机构地区：[1]北京化工大学材料科学与工程学院聚合物工程系,北京100029

出　　处：《高等学校化学学报》

年　　份：2000

卷　　号：21

期　　号：6

起止页码：980-982

语　　种：中文

收录情况：AJ、BDHX、BDHX1996、CAS、CSCD、CSCD2011_2012、EI、IC、JST、RCCSE、RSC、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：Ethyl α,α dibromoacetate was confirmed to be a difunctional initiator for the atom transfer radical polymerization of n butyl acrylate by means of gel penetration chromatography. When the polymerization of n butyl acrylate was carried out at different molar ratios of ethyl α,α dibromoacetate and ethyl α bromopropionate with CuBr/2,2′ bipyridine as the catalyst, polymers with bimodal molecular weight distributions were obtained, consisting of two narrowly distributed fractions, one of which was of a molecular weight double the other. Poly( n butyl acrylate) obtained with ethyl α,α dibromoacetate as the difunctional initiator was further used as the macroinitiator for styrene and methyl methacrylate in the presence of CuBr/2,2′ bipyridine respectively to prepare ABA triblock copolymers. It was found that high blocking efficiency was obtained for styrene. However, the polymer with bimodal molecular weight distribution was obtained for methyl methacrylate with a low molecular weight peak corresponding to that of poly( n butyl acrylate) macroinitiator. If the blocking polymerization was conducted with CuCl/ 2,2′ bipyridine as the catalyst to replace CuBr/2,2′ bipyridine, a high blocking efficiency was also obtained. [WT5HZ]

关 键 词：α,α-二溴乙酸乙酯  ABA型  ATRP 嵌段共聚物

分 类 号：O631.5]