化工进展

• 工业催化 • 上一篇    下一篇

镍的二亚胺催化剂的负载化及其催化乙烯的聚合

闫新华1,谷巨明2,石 艳1,李瑛琦1,赵敏坚1,付志峰1   

  1. 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
  • 出版日期:2011-09-05 发布日期:2011-09-05

Immobilization of Ni(II)-α-diimine catalyst and its application to catalyzing polymerization of ethylene

YAN Xinhua1,GU Juming 2,SHI Yan1,LI Yingqi 1,ZHAO Minjian 1,FU Zhifeng1   

  1. 1State Key Laboratory of Chemical Resource Utilization,Beijing University of Chemical Technology,Beijing 100029,China;2 Institute of Scientific and Technical Information of China,Beijing 100038,China
  • Online:2011-09-05 Published:2011-09-05

摘要:

NiII)的二亚胺催化剂[(2,6-i-PrPh)2DABAn]NiBr2通过物理吸附法负载在硅胶上,并将负载化催化剂在正己烷作溶剂的条件下用于催化乙烯的配位聚合,通过GPCDSCIR等对聚合物性能进行了表征,并与均相催化剂催化烯烃聚合进行对比。结果表明:通过物理吸附法所得负载化催化剂Al/Ni摩尔比约为100。在正己烷作溶剂时,负载化NiII)的二亚胺催化剂能够催化乙烯的聚合。与均相催化剂聚合体系相比,负载化催化剂的催化效率降低,所得聚合物分子量降低,密度、熔点均增大。在一定温度下随 Al/Ni 摩尔比、乙烯压力的增大,负载化催化剂催化效率逐渐提高,聚乙烯的支化度减小,分子量、密度、熔点均增大。

Abstract:

NiII-α-diimine catalyst [(2,6-i-Pr)2C6H3-DABAn]NiBr2 plus MAO was immobilized on the surface of silica gel by physical adsorptionand the immobilized catalyst was used to catalyze polymerization of ethylene. The polymer properties were determined by GPCDSCIRand were compared with the polymer made by homogeneous catalyst. The results showed that the Al/Ni molar ratio of immobilized NiII-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 catalystmolecular weight of the polymer and immobilized catalyst efficiency all decreasedwhile densityand Tm all increased. At a specific temperaturewith the increase of Al/Ni molar ratio and ethylene pressurebranching degree of polyethylenes decreasedwhile molecular weightdensityTm and immobilized catalyst efficiency all increased.

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn