Effect of Ethylene Prepolymerization in C2H4/H2 Atmosphere with Ti-Mg Catalyst on Gas-phase Ethylene Polymerization

Chem. J. Chinese Universities ›› 1996, Vol. 17 ›› Issue (7): 1154.

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Effect of Ethylene Prepolymerization in C₂H₄/H₂ Atmosphere with Ti-Mg Catalyst on Gas-phase Ethylene Polymerization

LI Yue¹, LIN Shang-An²

1. Department of Applied Chemistry, Dongguan Institute of Technology, Dongguan 511700;
2. Institute of Polymer Science, Zhongshan University

Received:1995-07-17 Online:1996-07-24 Published:1996-07-24

Abstract

Abstract: Ti-Mg catalyst treated by novel prepolymerization in C₂H₄/H₂ atmosphere shows a high activity and non-decaying kinetic profiles in gas-phase ethylene polymerization.The prepolymerization drastically reduces the initial polymerization rate and increases the bulk density (BD) of the resulting polymer product, exhibiting a similarity to the prepolymerization in C₂H₄/N₂ atmosphere, Characterization of the resulting polymer particle by SEMdemonstrates bound agglomerates of fine secondary polymer globules for the polymer surface,which could be effective for increasing BDof the product.

Key words: Ziegler-Natta catalyst, Prepolymerized catalyst, Gas phase ethylene polymerization

TrendMD:

LI Yue, LIN Shang-An. Effect of Ethylene Prepolymerization in C₂H₄/H₂ Atmosphere with Ti-Mg Catalyst on Gas-phase Ethylene Polymerization[J]. Chem. J. Chinese Universities, 1996, 17(7): 1154.

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Effect of Ethylene Prepolymerization in C₂H₄/H₂ Atmosphere with Ti-Mg Catalyst on Gas-phase Ethylene Polymerization

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