Microstructure of Polypropylene Prepared with Kaminsky Catalyst System

Lee, Cheal-Gyu; 이철규

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

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Vol.9, No.2

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Microstructure of Polypropylene Prepared with Kaminsky Catalyst System

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1996, v.9 no.2, pp.203-209

Lee, Cheal-Gyu

Lee, C. (1996). Microstructure of Polypropylene Prepared with Kaminsky Catalyst System. , 9(2), 203-209.

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Abstract

Kaminsky catalyst system($Et(Ind)_2ZrCl_2$ and MAO(methylaluminoxane)) was prepared. Propylene was polymerized at $60^{\circ}C$ in this system. The microstructure was studied by using the $^{13}C$ NMR spectrometer. From the $^{13}C$ NMR data, the 2, 1-insertion of propylene was controlled stereospecific by Kaminsky catalyst due to the structures of meso and racemo I. After the 2, 1-insertion of propylene, 1, 2-insertion of the chain end was less stereospecifically controlled by the catalyst.