Studies on Gaseous Phase Polymerization of Ethylene with Highly Active Catalyst(Ⅰ)──The Gaseous Phase Homo-and Copolymerization as well as Kinetics of Gaseous Phase Polymerization of Ethylene

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (3): 454.

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Studies on Gaseous Phase Polymerization of Ethylene with Highly Active Catalyst(Ⅰ)──The Gaseous Phase Homo-and Copolymerization as well as Kinetics of Gaseous Phase Polymerization of Ethylene

WANG Hai-Hua, LI Nai-Xin, LU Ze-Jian, LIN Shang-An

Institute of Polymer Science, Zhongshan University, Guangzhou, 510275

Received:1993-07-08 Revised:1993-10-23 Online:1994-03-24 Published:1994-03-24

Abstract

Abstract: The gaseous phase homo-and copolymerization of ethylene has been studied in the presence of TiCl₄/MgCl₂/ZnCl₂/SiCl₄/alcohol/Al(i-Bu )₃ highly active catalyst which was prepared by comilling-reaction procedure.It was found that the catalytic efficiency and bulk density of PEdecreased with increase in content of titanium compound.The added i-C₃H₇OHraises the catalytic performance and improves the morphology as well as particle distribution of the PEwith a optimum dosage of i-C₃H₇OH/MgCl₂=1.0-1.5.The kinetics of gaseous phase ethylene polymerization has been investigated.The polymerization rate equation in good agreement with experimental evidence is expressed as:v_t-v_s=(v₀-vs)e^-βt.The morphologies of the catalyst before and after prepolymerization as well as PE and LLDPE were examined by SEM.The structures and properties of the PEwith LLDPE were studied by WAXD,DSC and ¹³C NMR.

Key words: Gaseous phase polymerization of ethylene, Highly active catalyst, Copolymerization, Polymerization kinetics, TiCl₄, i-C₃H₇OH

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WANG Hai-Hua, LI Nai-Xin, LU Ze-Jian, LIN Shang-An. Studies on Gaseous Phase Polymerization of Ethylene with Highly Active Catalyst(Ⅰ)──The Gaseous Phase Homo-and Copolymerization as well as Kinetics of Gaseous Phase Polymerization of Ethylene[J]. Chem. J. Chinese Universities, 1994, 15(3): 454.

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Studies on Gaseous Phase Polymerization of Ethylene with Highly Active Catalyst(Ⅰ)──The Gaseous Phase Homo-and Copolymerization as well as Kinetics of Gaseous Phase Polymerization of Ethylene

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