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Digitale Medien

Crystalline order and melting behavior of isotactic polypropylene (α form) (1984)

Guerra, G. ; Petraccone, V. ; Corradini, P. ; [weitere]

New York : Wiley-Blackwell

Journal of Polymer Science: Polymer Physics Edition 22 (1984), S. 1029-1039

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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: Samples of isotactic polypropylene in the α form may have different degrees of order in the up and down positioning of the chains. By suitable programming of the crystallization history of unoriented samples it is possible to show, from DSC and WAXS data, that a strict correlation exists between the melting behavior and the degree of ordering of the chains. The process of ordering at annealing temperatures above 150°C may lead to a “continuum” of modifications of the α form from less ordered to highly ordered ones; correspondingly we observe an increase in the melting point by as much as 15°C.

Zusätzliches Material: 10 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1984.180220608

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