Metallocene–methyl aluminoxane catalysts for olefin polymerization. VIII. Infrared spectra of anisotactic polypropylene

James C.W. Chien; Bernhard Rieger; H. Martin Herzog

doi:10.1002/pola.1990.080281102

Metallocene–methyl aluminoxane catalysts for olefin polymerization. VIII. Infrared spectra of anisotactic polypropylene

James C.W. Chien, Bernhard Rieger, H. Martin Herzog

University of Massachusetts Amherst

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Polypropylenes obtained with the homogeneous racemic ethylene bis(indenyl) zirconium dichloride/methyl‐aluminoxane catalyst were fractionated by solvent extraction. The IR absorbance ratios, A₉₉₈/A₉₇₃ and A₈₄₁/A₉₇₃, were found to vary linearly with the homosteric sequence population, [m m m m] and [m m]. These results are compared with the results of a similar study by Burfield and Loi on commercial and laboratory polypropylenes of the conventional types.

Original language	English
Pages (from-to)	2907-2915
Number of pages	9
Journal	Journal of Polymer Science, Part A: Polymer Chemistry
Volume	28
Issue number	11
DOIs	https://doi.org/10.1002/pola.1990.080281102
State	Published - Oct 1990
Externally published	Yes

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abstract = "Polypropylenes obtained with the homogeneous racemic ethylene bis(indenyl) zirconium dichloride/methyl‐aluminoxane catalyst were fractionated by solvent extraction. The IR absorbance ratios, A998/A973 and A841/A973, were found to vary linearly with the homosteric sequence population, [m m m m] and [m m]. These results are compared with the results of a similar study by Burfield and Loi on commercial and laboratory polypropylenes of the conventional types.",

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AU - Rieger, Bernhard

AU - Herzog, H. Martin

PY - 1990/10

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N2 - Polypropylenes obtained with the homogeneous racemic ethylene bis(indenyl) zirconium dichloride/methyl‐aluminoxane catalyst were fractionated by solvent extraction. The IR absorbance ratios, A998/A973 and A841/A973, were found to vary linearly with the homosteric sequence population, [m m m m] and [m m]. These results are compared with the results of a similar study by Burfield and Loi on commercial and laboratory polypropylenes of the conventional types.

AB - Polypropylenes obtained with the homogeneous racemic ethylene bis(indenyl) zirconium dichloride/methyl‐aluminoxane catalyst were fractionated by solvent extraction. The IR absorbance ratios, A998/A973 and A841/A973, were found to vary linearly with the homosteric sequence population, [m m m m] and [m m]. These results are compared with the results of a similar study by Burfield and Loi on commercial and laboratory polypropylenes of the conventional types.

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U2 - 10.1002/pola.1990.080281102

DO - 10.1002/pola.1990.080281102

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AN - SCOPUS:0025505398

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JO - Journal of Polymer Science, Part A: Polymer Chemistry

JF - Journal of Polymer Science, Part A: Polymer Chemistry

IS - 11

ER -

Metallocene–methyl aluminoxane catalysts for olefin polymerization. VIII. Infrared spectra of anisotactic polypropylene

Abstract

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