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- E-ISSN 2288-8985
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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,
C.
(1996). Microstructure of Polypropylene Prepared with Kaminsky Catalyst System. Analytical Science and Technology, 9(2), 203-209.
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Abstract
Kaminsky catalyst system(<TEX>$Et(Ind)_2ZrCl_2$</TEX> and MAO(methylaluminoxane)) was prepared. Propylene was polymerized at <TEX>$60^{\circ}C$</TEX> in this system. The microstructure was studied by using the <TEX>$^{13}C$</TEX> NMR spectrometer. From the <TEX>$^{13}C$</TEX> 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.
- keywords
- Kaminsky catalyst system, sterospecific, regieospecific, microstructure
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