The detailed analysis of the vinylidene structure of metallocene-catalyzed polypropylene |
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| Authors: | Nobuo Kawahara Shin-ichi Kojoh Akira Mizuno |
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| Affiliation: | a R and D Center, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura-shi, Chiba-ken 299-0265, Japan
b Analysis Research Laboratory, Mitsui Chemical Analysis and Consulting Service, Inc., 6-1-2 Waki, Waki-cho, Kuga-gun, Yamaguchi-ken 740-0061, Japan |
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| Abstract: | The vinylidene structures in polypropylenes produced by ethylenebis(indenyl)zirconiumdichloride (En(Ind)2ZrCl2), 1, and isopropyl(cyclopentadienyl)(fluorenyl)zirconiumdichloride (iPr(Cp)(Flu)ZrCl2), 2, were analyzed by 1H NMR. The vinylidene group adjacent to the chain end was clearly distinguished from other internal vinylidene structures for the first time using 1,2-dichlorobenzene as solvent. The polypropylene produced by 2 had much internal vinylidene groups compared with one by 1. |
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| Keywords: | Metallocene catalyst Polypropylene Analytical characterization |
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