化工进展2011，Vol.30Issue(9)：1977-1981,5.
镍的二亚胺催化剂的负载化及其催化乙烯的聚合
Immobilization of Ni（Ⅱ）-α-diimine catalyst and its application to catalyzing polymerization of ethylene
闫新华 1谷巨明 2石艳 1李瑛琦 1赵敏坚 1付志峰1
作者信息
- 1. 化工资源有效利用国家重点实验室北京化工大学,北京100029
- 2. 中国科学技术信息研究所,北京100038
- 折叠
摘要
Abstract
Ni（Ⅱ）-α-diimine catalyst [（2,6-i-Pr）2C6H3-DAB（An）]NiBr2 plus MAO was immobilized on the surface of silica gel by physical adsorption,and the immobilized catalyst was used to catalyze polymerization of ethylene.The polymer properties were determined by GPC,DSC,IR,and were compared with the polymer made by homogeneous catalyst.The results showed that the Al/Ni molar ratio of immobilized Ni（Ⅱ）-α-diimine catalyst was about 100.And the immobilized catalyst could catalyze the homopolymerization of ethylene in n-hexane.Compared with the polymer made by the homogeneous catalyst,molecular weight of the polymer and immobilized catalyst efficiency all decreased,while density,and Tm all increased.At a specific temperature,with the increase of Al/Ni molar ratio and ethylene pressure,branching degree of polyethylenes decreased,while molecular weight,density,Tm and immobilized catalyst efficiency all increased.关键词
负载化Ni（Ⅱ）的二亚胺催化剂/乙烯/正己烷/配位聚合Key words
immobilized Ni（Ⅱ）-α-diimine catalyst/ethylene/n-hexane/coordination polymerization分类
化学化工引用本文复制引用
闫新华,谷巨明,石艳,李瑛琦,赵敏坚,付志峰..镍的二亚胺催化剂的负载化及其催化乙烯的聚合[J].化工进展,2011,30(9):1977-1981,5.
