Studies on Propylene Polymerization and Polymerization Kinetics Under Highly Active Catalyst Comprising Phthalic Ester

Abstract

Abstract: The polymerization of propylene under highly active catalyst comprising phthalic esters 1,2-C₆H₄(COOEt)₂,1,2-C₆H₄(COOCH₂CH=CH₂)₂,1,2-C₆H₄(COOBu)₂ as electron-donors has been studied.It was found that the PPtacticity would raise with increasing phthalic esters,and the catalytic activity decreases while the PPtacticity increases.By adding silicon compounds PhSi(OEt)₃,Ph₂Si(OMe)₂,Ph₂Si(OEt)₂,(CH₃)₂Si(OEt)₂,there are almost the same results.The kinetics of propylene polymerization has been investigated.The polymerization rate equation in good agreement with experimental evidence is expressed as:V_t-V_a=(V₀-V_a)e^-βt,The change in morphology of the catalyst was studied before and after adding phthalate ester by SEM.

Key words: Propylene polymerization, Highly active catalyst, Phthalic esters, Polymerization kinetics, TiCl₄

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WANG Hai-Hua, ZHANG Qi-Xing, RAO Guang-Jie, LIN Shang-An . Studies on Propylene Polymerization and Polymerization Kinetics Under Highly Active Catalyst Comprising Phthalic Ester[J]. Chem. J. Chinese Universities, 1992, 13(12): 1621.

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Studies on Propylene Polymerization and Polymerization Kinetics Under Highly Active Catalyst Comprising Phthalic Ester

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