Citation: Min Yang, Qin Li, Xiang-liu Li, Bo-wen Hu, Xiao-fang Dong, Jia-yan Qu, Bin-yuan Liu, Xi Wang, Xiao-yu Hao. 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 shu

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

1.
Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China

Received Date: 24 August 2015
Revised Date: 2 October 2015

Fund Project: This work was financially supported by the Natural Science Foundation of Hebei Province (No. B2015202049) and the National Natural Science Foundation of China (Nos. 21004017 and 50573018).

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)2ZrCl2/AlEt2Cl/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.
- Tandem catalysis,
- Branched polyethylene,
- Metallocene,
- Alkylaluminum,
- Methylaluminoxane
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沈阳化工大学材料科学与工程学院沈阳 110142