双核中性镍的合成及其催化乙烯聚合  

Synthesis of Binuclear Neutral Nickel Complex and Its Use for Ethylene Polymerization

作　　者：王临才[1] 孙俊全[1] 程正载[1] 

机构地区：[1]浙江大学化工系,浙江杭州310027

出　　处：《湖南大学学报（自然科学版）》2007年第12期58-62,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(20374043)

摘　　要：经希夫碱缩合反应，制得水杨醛亚胺配体（3），其Na盐与trans-NiClPh（PPh3）2合成了新型中性镍配合物4{[ο（3-Cyclopentenyl）-（5-Me）C6H2-ο-C（H）=N-2，6-（i-Pr）2C6H2]2CH2}[Ni（Ph3P）（Ph）]2．经Ni（COD）2活化，配合物4的最高活性达12．12×10^5gPE／（molNi·h），所得聚合物黏均相对分子质量在1．93×10^4-9．49×10^4之间,研究了不同聚合条件对催化性能的影响,配合物4可以作为单组分催化剂催化乙烯聚合，活性高达1．49×10^5gPE／（molNi·h），所得聚乙稀相对分子质量及其分布分别达到了5．27×10^4和3．34。Substituted salicyladimine ligand （3） was prepared by schiff base condensation, and its sodium salts reacted with trans-NiC1Ph （PPh3）2 to give binuclear nickel complex 4{[ο（3-Cyclopentenyl）-（5-Me）C6H2-ο-C（H）=N-2,6-（i-Pr）2C6H2]2CH2}[Ni（Ph3P）（Ph）]2. With Ni（COD）2 as the co-catalyst, the catalytic activity of ethylene polymerization by complex 4 was up to 12.12×10^5 gPE/（molNi·h）. The molecular weights of PE ranged from 1.93×10^4 to 9.49× 10^4（Mη）. The influences of reaction parameters, such as Ni（COD）2/Ni, temperature, ethylene pressure and time were studied in detail. In addition, complex 4 could also catalyze ethyl- ene polymerization as single component catalyst with the highest activity of 1.49×10^5 gPE/（molNi·h）. The molecular weight and molecular weight distribution of PE produced by complex 4 alone reached 5.27×10^4 and 3.34 respectively.

关 键 词：聚乙烯 后过渡金属 水杨醛亚胺 中性镍 双核 

分 类 号：O643.3[理学—物理化学] TQ211[理学—化学]