MoO_2Br_2体系催化丁二烯聚合中烯丙基卤素的作用  

FUNCTIONS OF ALLYL -HALOGEN IN POLYMERIZATION OF BUTADIENE WITH MoO_2Br_2 CATALYST SYSTEM

作　　者：陈滇宝[1] 方旺喜 王利峡[1] 汤志宏 扈梅 唐学明[1] 

机构地区：[1]青岛化工学院高分子材料系

出　　处：《高分子学报》1994年第5期513-519,共7页Acta Polymerica Sinica

基　　金：国家自然科学基金

摘　　要：ＭｏＯ２Ｂｒ２－Ａｌ（ｉ－Ｂｕ）２ＯＰｈＣＨ３（－ｍ）体系催化丁二烯１，２－聚合过程中添加Ｃ３Ｈ５Ｘ（Ｘ＝Ｃｌ、Ｂｒ和Ｉ）对聚合物分子量有较好的调节作用，其中以Ｃ３Ｈ５Ｂｒ的调节作用最强，Ｍｎ从１７．５×１０５降至３．５×１０５，但对催化活性有一定的影响．在测定催化体系的ＵＶ光谱、（１３）Ｃ－ＮＭＲ谱、聚合活性和聚合动力学参数的基础上，讨论了Ｃ３Ｈ５Ｘ在催化体系中的行为．he effect of CH2 = CH - CH2X (X=Cl,Br and I ) on polymerization activity and molecular weight of polymer has been studied in molybdenum catalyst system for 1,2-- polymerization of butadiene. The functions of CH2=CH -- CH2Br among three kind of allyl--halogen are the best for the catalytic activity and the regulation of molecular weight of 1, 2-- polybutadiene from Mn= 3. 5 × 105 to 17. 5×105. From the data obtained by 13C--nmr and UV spectra of CH2= CH -- CH2X and butadiene molecules as well as parameters of polymerization activity and kynetics it was propose that a frequency mechanismwhich was under the control of the molecular weight of polymer existed in the reactions between complexing reaction and discompleking reaction, i.e.

关 键 词：二溴二氧化钼 丁二烯 催化 卤素 

分 类 号：O632.14[理学—高分子化学]