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Non-isothermal crystallization kinetics of filled blends of polypropylene and low density polyethylene

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Abstract

Non-isothermal crystallization kinetics of filled polymer blends was investigated by DTA. Crystallization in hybrid matrices containing small amounts of low density polyethylene was shown to proceed more rapidly than that in pure polypropylene. This effect was more pronounced in the presence of a mineral filler. The Kolmogorov-Avrami kinetic model can be used to describe the crystallization process under non-isothermal conditions.

Zusammenfassung

Mittels DTA wurde die nichtisotherme Kristallisationskinetik von gestreckten Polymergemischen untersucht. Es konnte gezeigt werden, daß die Kristallisierung in einer Hybridmatrix mit einem Gehalt an Polyethylen geringer Dichte schneller vor sich geht, als in reinem polypropylen. Dieser Effekt wird im Falle eines Minerals als Streckmittel noch ausgeprägter. Zur Beschreibung des Kristallisationsprozesses unter nichtisothermen Bedingungen kann das kinetische Modell von Kolmogorov-Avrami benutzt werden.

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Kerch, G.M., Irgen, L.A. Non-isothermal crystallization kinetics of filled blends of polypropylene and low density polyethylene. Journal of Thermal Analysis 36, 129–135 (1990). https://doi.org/10.1007/BF01912076

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  • DOI: https://doi.org/10.1007/BF01912076

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