常规自由基聚合法合成支化聚(丙烯腈-醋酸乙烯酯)  

Synthesis of Branched Poly(AN-co-VAc) via Conventional Free Radical Polymerization

作　　者：李斐[1] 黄文艳[1] 薛小强[1] 陈建海[1] 杨扬[1] 刘超[1] 蒋必彪[1] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164

出　　处：《高分子材料科学与工程》2012年第12期29-31,36,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21174020)

摘　　要：以甲基丙烯酸-2-羟乙酯和3-巯基丙酸经脱水酯化法合成了链转移剂单体甲基丙烯酸-3-巯基丙酰氧基乙酯(MM-POE)。以偶氮二异丁腈(AIBN)为引发剂,在MMPOE存在下进行丙烯腈和醋酸乙烯酯的常规自由基共聚反应合成支化聚(丙烯腈-醋酸乙烯酯)。用高效液相色谱、气相色谱、三检测凝胶渗透色谱(TD-GPC)和核磁共振谱(1H-NMR)对链转移剂单体、聚合反应过程和聚合物进行了表征分析。研究表明,以MMPOE为支化单体制得的支化聚(丙烯腈-醋酸乙烯酯),其支化程度随MMPOE的增加而提高;支化聚(丙烯腈-醋酸乙烯酯)的溶液黏度是相近分子量线型聚合物溶液黏度的20%～25%。2- （3-mercaptopropionyloxy） ethyl methacrylate （MMPOE）, a chain transter monomer, was synmesLzeu from α-methacrylate hydroxyethyl methacrylate and 3- mercaptopropionic acid. The polymerization of acrylonitrile （AN） and vinyl acetate （VAc） was carried out using MMPQE as the branching agent. Gas chromatography （GC）, high-performance liquid chromatography （HPLC）, proton nuclear magnetic resonance （1H-NMR） and tripledetection gel-permeation chromatography （TD-GPC） were used to characterize and analyze the chain transfer monomer, the polymerization and the resulting branched polymer. As expected, branched poly（AN-co-VAc） with high degree of branching was prepared, which has obviously low intrinsic viscosity and shear viscosity compared with its linear analogue. The viscosity of branched poly（AN-eo-VAc）s solution is only 20 % -25 % of that of their linear counterparts.

关 键 词：支化聚(丙烯腈-醋酸乙烯酯) 自由基聚合 链转移剂单体 

分 类 号：TQ316.322[化学工程—高聚物工业]