Synthesis of Hydroxyl Group Containing Polyolefins with Metallocene/Methylaluminoxane Catalysts
Ethylene and propylene were copolymerized with 10-undecen-1-ol, using stereorigid Et[Ind]2ZrCl2, Me2Si[Ind]2ZrCl2, Me2Si[2-MeInd]2ZrCl2, and Me2Si[2-Me-4,5-BenzoInd]2ZrCl2 catalysts activated with methylaluminoxane (MAO). As a reference, ethylene copolymerization was also carried out with the nonste...
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Published in | Macromolecules Vol. 29; no. 16; pp. 5255 - 5260 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
29.07.1996
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Subjects | |
Online Access | Get full text |
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Summary: | Ethylene and propylene were copolymerized with 10-undecen-1-ol, using stereorigid Et[Ind]2ZrCl2, Me2Si[Ind]2ZrCl2, Me2Si[2-MeInd]2ZrCl2, and Me2Si[2-Me-4,5-BenzoInd]2ZrCl2 catalysts activated with methylaluminoxane (MAO). As a reference, ethylene copolymerization was also carried out with the nonstereospecific catalyst [Ind]2ZrCl2/MAO. Characterization of the copolymers by 13C and 1H NMR spectroscopy revealed that the polymerization product was a true copolymer and that the conversion of the polar comonomer was strongly favored by the chiral geometry of the catalyst. The pretreatment of 10-undecen-1-ol with MAO before initiating the copolymerization increased the ethylene polymerization rate markedly and slightly improved the reactivity of the polar comonomer. A major improvement in the polymerization rate of 10-undecen-1-ol was obtained when the polymerization temperature and Al/Zr mole ratio were increased. |
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Bibliography: | Abstract published in Advance ACS Abstracts, June 15, 1996. istex:B02B8809F8587E100E9C06A27EE1080502C9DA05 ark:/67375/TPS-HLH858Q1-N |
ISSN: | 0024-9297 1520-5835 |
DOI: | 10.1021/ma951607g |