摘要
合成了烯丙基对甲基水杨醛亚胺和环戊烯基对甲基水杨醛亚胺配体 ,并与trans [NiCl(Ph) (PPh3 ) 2 ]反应合成了配合物[O (3 allyl) (5 CH3 )C6H2 o C(H)∶N 2 ,6 C6H3 (i Pr) 2 ]Ni(PPh3 ) (Ph)和 [O (3 cyclopentenyl) (5 CH3 )C6H2 o C(H)∶N 2 ,6 C6H3 (i Pr) 2 ]Ni(PPh3 ) (Ph) ,以MS ,1 HNMR和元素分析对配体及配合物进行了表征 .在Ni(COD) 2 (COD环辛二烯 )助催化下成功地催化乙烯聚合 ,在 80 8kPa的压力下 ,前者配合物的最高活性可达 2 6 5kg/ (mol·h) ,聚乙烯的粘均分子量在 (0 95～ 3 85 )× 1 0 4间 ;后者配合物的最高活性可达 4 34kg/ (mol·h) ,聚乙烯的粘均分子量在 (0 87～ 5 81 )× 1 0 4间 .添加THF ,CH3 COOEt和EtOEt对催化聚合性能无显著影响 ,添加甲基丙烯酸甲醇则不仅不发生共聚 。
Allyl substituted salicylaldimine and cyclopentenyl substituted salicylaldimine were prepared and reacted with trans [NiCl(Ph)(PPh 3)] to complexes [ O (3 allyl)(5 CH 3)C 6H 2 o C(H)∶N 2,6 C 6H 3( i Pr) 2]Ni (PPh 3)(Ph) and [ O (3 cyclopentenyl)(5 CH 3)C 6H 2 o C(H)∶N 2,6 C 6H 3( i Pr) 2]Ni(PPh 3)(Ph). These complexes activated by Ni(COD) 2 (COD1,5 cyclooctadiene) could catalyze ethylene polymerization effectively. At p =808 kPa, the activity of the first complex reached 265 kg/(mol·h) , and the M η of the polymer product ranged in 0 95×10 4～3 85×10 4; the activity of the second complex reached 434 kg/(mol·h) , and the M η of the polymer product ranged in 0 87×10 4～5 81×10 4. Addition of THF, CH 3COOEt and EtOEt had no evident effects on the polymerization, but addition of methyl methacrylate reduced the polymerization reactivity markedly.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2004年第7期518-522,共5页
基金
国家自然科学基金 ( 2 0 0 740 2 8)
中国石油化工股份有限公司 (X5 0 0 0 3 0 )资助项目
