Tandem Catalysis of One Metallocene Catalyst Combined with Two Different Cocatalysts for Preparing Branched Polyethylene

Min Yang; Qin Li; Xiang-liu Li; Bo-wen Hu; Xiao-fang Dong; Jia-yan Qu; Bin-yuan Liu; Xi Wang; Xiao-yu Hao

doi:10.1007/s10118-016-1737-0

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Tandem Catalysis of One Metallocene Catalyst Combined with Two Different Cocatalysts for Preparing Branched Polyethylene

Updated：2021-06-21

- Tandem Catalysis of One Metallocene Catalyst Combined with Two Different Cocatalysts for Preparing Branched Polyethylene
- Chinese Journal of Polymer Science Vol. 34, Issue 3, Pages: 298-306(2016)
- Affiliations：
  
  Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China
- Author bio：
  
  **Min Yang (杨敏), E-mail: polyym@163.com
  Bin-yuan Liu (刘宾元), E-mail: byliu@hebut.edu.cn
- Funds：
- DOI：10.1007/s10118-016-1737-0
  CLC：
- Received：24 August 2015，
  
  Revised：2015-10-02，
  
  Accepted：07 October 2015，
  
  Published：2016-03
- Accepted：
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Min Yang, Qin Li, Xiang-liu Li, et al. Tandem Catalysis of One Metallocene Catalyst Combined with Two Different Cocatalysts for Preparing Branched Polyethylene[J]. Chinese Journal of Polymer Science, 2016, 34(3): 298-306.
DOI：

Min Yang, Qin Li, Xiang-liu Li, et al. Tandem Catalysis of One Metallocene Catalyst Combined with Two Different Cocatalysts for Preparing Branched Polyethylene[J]. Chinese Journal of Polymer Science, 2016, 34(3): 298-306. DOI： 10.1007/s10118-016-1737-0.

摘要

Abstract

Tandem catalytic systems

consisting of ethylene bis(indenyl) zirconium dichloride with two different cocatalysts

alkylaluminum (diethylaluminium chloride or trialkylaluminum) and methylaluminoxane

were employed in preparing branched polyethylene from ethylene as sole monomer. The catalytic system

rac

-Et(Ind)

ZrCl

/AlEt

Cl/MAO exhibited high incorporation (29.0/1000C). The oligomerization and copolymerization reaction conditions in the tandem catalytic system

as well as the different cocatalysts

have effects on the catalytic activity and the properties of the obtained polymer

such as melting temperature

crystallinity

molecular weight and molecular weight distribution. Moreover

the oligomerization reaction condition is the main factor in altering the properties and structures of polyethylene.

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