活性自由基聚合法合成新型裘皮型羧酸酯基功能高分子  

SYNTHESIZING A FUR-TYPE FUNCTIONAL RESIN BEARING CARBOXYLIC ESTER GROUPS VIA ATRP

作　　者：宋立明[1] 仝浩[1] 李弘[1] 

机构地区：[1]南开大学高分子化学研究所,天津300071

出　　处：《离子交换与吸附》2005年第2期151-158,共8页Ion Exchange and Adsorption

基　　金：天津市自然科学基金资助研究课题(No.023604211)

摘　　要：采用原子转移自由基聚合反应(ATRP)经二步法合成了一种裘皮型羧酸酯基功能高分子。首先以氯化亚铜-联吡啶络合物(CuCl-bPy)为催化体系,以α-溴代丙酸乙酯(EBP)为引发剂、乙腈(AN)为溶剂在80℃进行甲基丙烯酸甲酯(MMA)的均相ATRP反应,合成得到带溴原子端基的线型聚甲基丙烯酸甲酯(PMMA-Br),其分子量分布呈单分散性(Mn=7.5~8.6×104,PDI≤1.08);利用所合成PMMA-Br为大分子引发剂、二乙烯基苯(DVB)为单体(交联剂)、氯化亚铜·五甲基二亚乙基三胺(CuCl·PMDETA)为催化剂,在110℃苯甲醚(PME)溶液中进行DVB的活性原子转移自由基聚合反应,合成得到了一种12臂,臂长为120nm^140nm的裘皮型羧酸酯基功能高分子。分析结果表明,所合成裘皮树脂的尺寸均一性良好(PDI≤1.54)。A fur-type functional resin bearing carboxylic ester group was synthesized by atom transfer radical polymerization (ATRP) via two steps: 1. Firstly, the homogeneous ATRP of MMA was carried out using CuCl · bPy complex generated in situ as the catalyst, ethyl 2-bromopropionate (EBP) as initiator and acetonitrile as the solvent. The formed polymer bearing Br terminal group (PMMA-Br) possesses monodromic molecular weight (Mn: 7.5~8.7 × 104, PDI [less-than or equal to] 1.08) indicating the typical living characteristic of the ATRP conducted; 2. A Fur-type functional resin bearing linear PMMA chains of monodromic molecular weight as the arms was synthesized using PMMA-Br, synthesized above, as the macroinitiator, CuCl · PMDETA complex generated in situ as the catalyst, divinyl benzene as the bifunctional monomer (crosslinking agent) and anisole as the solvent at temperature 110°C. The synthesized multiarm (12~13) fur-type resin possesses pretty long arm length (120 nm^140 nm). Result of GPC analysis indicates that the synthesized fur-type resin possesses pretty good homogeneity of molecular size (PDI [less-than or equal to] 1.54).

关 键 词：原子转移自由基聚合 裘皮型树脂 聚甲基丙烯酸甲酯 大分子引发剂 反应性高分子 

分 类 号：TQ425.2[化学工程]