Ti(acac)_2Cl_2/AlEt_2Cl(或AlEt_2Cl-ZnCl_2)催化剂催化丙烯腈聚合反应  

STUDY OF POLYMERIZATION OF ACRYLONITRILE WITH Ti(acac)_2Cl_2/AlEt_2Cl (OR AlEt_2Cl-ZnCl_2) CATALYST

作　　者：范新刚[1] 王海华[1] 胡志华[1] 胡明鹏[1] 张启兴[1] 

机构地区：[1]中山大学高分子研究所,广东广州510275

出　　处：《高分子材料科学与工程》2004年第1期94-96,100,共4页Polymer Materials Science & Engineering

基　　金：广东省自然科学基金资助项目(001280)

摘　　要：研究了Ti(acac)2Cl2/AlEt2Cl催化丙烯腈聚合反应,分析了加入第三组分ZnCl2对聚合反应的影响,用13C-NMR对聚合产物进行了表征,并探讨了聚合反应机理。结果表明,随着聚合温度的提高和聚合反应时间的增加,单体转化率增大,聚丙烯腈的分子量提高。当体系中n(AN)/n(Cat)超过一定量时,则得不到高聚物。体系中加入ZnCl2能明显提高单体转化率和产物分子量,并且产物的三单元规整结构含量明显增加。The polymerization of acrylonitrile was achieved by a new catalyst of Ti(acac)_2Cl_2/AlEt_2Cl simultaneously with a polymerization kinetics study on polymerization time and polymerization temperature. The monomer conversion could be greatly improved when ZnCl_2 was added to the catalyst in amount of n(AlEt_2Cl)/n(ZnCl_2)=2. Moreover, the yielding PAN with Ti(acac)_2Cl_2/AlEt_2Cl-ZnCl_2 showed a higher triad regularity structrue than that made with Ti(acac)_2Cl_2/AlEt_2Cl. The different initiation-propagation mechanisms were proposed with ()^(13)C-NMR confirmation.

关 键 词：聚丙烯腈 Ti(acac)2Cl2/AlEt2Cl 催化聚合 ZNCL2 三单元规整结构 

分 类 号：TQ325.8[化学工程—合成树脂塑料工业]