Cp′Ti(OAr)Cl2/[Ph3C]^+[B(C6F5)4]^-催化体系合成高相对分子质量无规聚丙烯弹性体  

Synthesis of High Molecular Weight Atactic Polypropylene Elastomer by Catalytic System of Cp′Ti(OAr)Cl2/[Ph3C]^+[B(C6F5)4]^-

作　　者：吕春胜[1] 成名 许普[2] 翟雪 Chunsheng Lv;Ming Cheng;Pu Xu;Xue Zhai(School of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318,China;PetroChina Fushun Petrochemical Company Research Institute,Fushun 113000,China)

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]中国石油抚顺石化公司研究院,辽宁抚顺113000

出　　处：《高分子材料科学与工程》2020年第9期22-31,共10页Polymer Materials Science & Engineering

摘　　要：以相应的Cp′TiCl3为原料(Cp′为取代环戊二烯基)制备了3种非桥联单茂金属催化剂1,2,3,4,5-五甲基-环戊二烯基-2,4,6-三叔丁基酚氧基二氯化钛(A)、1-苯基-2,3,4,5-四甲基-环戊二烯基-2,4,6-三叔丁基酚氧基二氯化钛(B)和1,2-二苯基-4-甲基-环戊二烯基-2,4,6-三叔丁基酚氧基二氯化钛(C)。研究了铝钛摩尔比(n(Al)/n(Ti))和温度(T)对催化剂的活性及聚合物相对分子质量(Mw)的影响。结果显示,应用Al(^iBu)3-[Ph3C]^+[B(C6F5)4]^-助催化剂,在合适的Al/Ti(摩尔比160)和温度(70℃)下,3种配合物催化丙烯聚合均具有良好的催化活性(5.15×10^6~6.12×10^6 gPP/(mol Ti·h)),可以制备出高相对分子质量(Mw=8.54×10^4~29.26×10^4)无规聚丙烯弹性体。Three non-bridged titanium(IV)cyclopentadienyl-aryloxy complexes such as 1,2,3,4,5-pentamethyl-cyclopentadienyl-2,4,6-tri-tert-butylphenoxytitanium(IV)dichloride(A),1-phenyl-2,3,4,5-tetramethyl-cyclopentadienyl-2,4,6-tri-tert-butylphenoxytitanium(IV)dichloride(B)and 1,2-diphenyl-4-methyl-cyclopentadienyl-2,4,6-tri-tert-butylphenoxytitanium(IV)dichloride(C)could be prepared from corresponding Cp′TiCl3(Cp′=cyclopentadienyl).The influence of the mole ratio of Al/Ti(n(Al)/n(Ti))and temperature(T)on the catalytic activity and the polymer molecular weight(Mw)was investigated.The results show that when activated by Al(^iBu)3-[Ph3C]^+[B(C6F5)4]^-cocatalyst,three complexes show higher catalytic activities for the propylene polymerization(5.15×10^6~6.12×10^6 g PP/(mol Ti·h))and the atactic polypropylene elastomers with high molecular weight(Mw=8.54×10^4~29.26×10^4)could be produced through propylene polymerization at the suitable mole ratio of Al/Ti(160)and temperature(70℃).

关 键 词：非桥联茂金属催化剂 丙烯聚合 高相对分子质量 无规聚丙烯 弹性体 

分 类 号：TQ334.2[化学工程—橡胶工业]