Effect of oxidation and modifiers on polypropylene crystallization

Effect of oxidation and modifiers on polypropylene crystallization The effect of ester modifiers [di-n-alkyl esters derived from o-phthalic acid and C7-C9 alcohol fractions; poly(propylene glycol adipate) dibutyl ester] on the polypropylene oxidation and crystallization was studied. The modifiers influence the size of the crystallization nuclei and the polypropylene crystallization rate. Various models were used for mathematical description of the process, of which the Avrami model appeared to be the most adequate. The ester modifiers strongly influence the resistance of polypropylene to thermal oxidation: introduction of poly(propylene glycol adipate) dibutyl ester, thermodynamically incompatible with polypropylene, leads to a considerable increase in the induction period of oxidation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Effect of oxidation and modifiers on polypropylene crystallization

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Publisher
Pleiades Publishing
Copyright
Copyright © 2014 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427214120179
Publisher site
See Article on Publisher Site

Abstract

The effect of ester modifiers [di-n-alkyl esters derived from o-phthalic acid and C7-C9 alcohol fractions; poly(propylene glycol adipate) dibutyl ester] on the polypropylene oxidation and crystallization was studied. The modifiers influence the size of the crystallization nuclei and the polypropylene crystallization rate. Various models were used for mathematical description of the process, of which the Avrami model appeared to be the most adequate. The ester modifiers strongly influence the resistance of polypropylene to thermal oxidation: introduction of poly(propylene glycol adipate) dibutyl ester, thermodynamically incompatible with polypropylene, leads to a considerable increase in the induction period of oxidation.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Mar 25, 2015

References

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