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Digitale Medien

Coisotactic shift contributions in 13C NMR spectra of propylene/butene-1 copolymers (1979)

Usami, Takao ; Kosugi, Yoshio ; Takeuchi, Tsugio

New York : Wiley-Blackwell

Journal of Polymer Science: Polymer Physics Edition 17 (1979), S. 1413-1416

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Details

ISSN: 0098-1273

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Notizen: Coisotactic shift contributions caused by sterically crowded isotactic side-chain alkyl groups are proposed for peak assignments of isotactic propylene/butene-1 copolymers. Previously disputed analyses of methine triads and PB tetrads of backbone methylene carbons (α,α′-CH2) have been verified using first-order Markovian distribution theory. Coisotactic shift contributions also account for the reverse order of the propylene-centered triads from that predicted by the Grant-Paul equation.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1979.180170812

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