Studies on Catalyst Containing Novel Asymmetric Diether forPropene Polymerization

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (5): 982.

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Studies on Catalyst Containing Novel Asymmetric Diether forPropene Polymerization

XU De-Min¹, MA Zhi¹, MI Xia¹, KE Yu-Cai¹, HU You-Liang¹, WU Chun-Hong²

1. State Key Laboratory of Engineering Plastics, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
2. Analysis Center, Research Institute of Yanshan Petrochemical Co. Ltd., Beijing 102500, China

Received:2000-12-19 Online:2002-05-24 Published:2002-05-24

Abstract

Abstract: MgCl₂ supported Ziegler-Natta catalyst containing a novel asymmetric diether as internal donor was prepared for polymerization of propene.The effects of polymerization temperature and the n(Al)/ n(Ti) ratio on the catalytic activity and the molecular weight, the isotacticity and the melting point of polypropene were investigated.In comparison with the symmetric diether catalysts, the catalytic activity and the isotacticity of polypropene were much lower.The stereosequence distributions were analyzed by means of ¹³C NMR and the results obtained indicate that isotactic, syndiotactic and iso-syndiotactic block polypropenes were produced.The stereo effect of MBF and the polymerization mechanism were discussed.

Key words: Diether, Ziegler-Natta catalyst, Polypropene

CLC Number:

O632.12

TrendMD:

XU De-Min, MA Zhi, MI Xia, KE Yu-Cai, HU You-Liang, WU Chun-Hong. Studies on Catalyst Containing Novel Asymmetric Diether forPropene Polymerization[J]. Chem. J. Chinese Universities, 2002, 23(5): 982.

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Studies on Catalyst Containing Novel Asymmetric Diether forPropene Polymerization

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