Thermodynamics of poly(vinyl chloride) mixing with phthalate plasticizers / Safronov AP,Somova TV // POLYMER SCIENCE SERIES A. - 2002. - V. 44, l. 11. - P. 1208-1215.

ISSN/EISSN:

0965-545X / нет данных

Type:

Article

Abstract:

The phase behavior and thermodynamics of interaction in poly(vinyl chloride) blends with dimethyl-, diethyl-, dibutyl-, di(2-ethyl)hexyl-, di(2,5,5-methyl)hexyl-, didodecyl-, and ditridecyl o-phthalates were experimentally studied. It was shown that, over the entire composition range studied, all these systems are homogeneous within the temperature interval ranging from the melting point of a plasticizer to 420 K. The only exception is the blend based on dimethyl o-phthalate, for which an UCST is observed at 355 K. The enthalpies of dissolution of polymer blends with plasticizers and individual components in cyclohexanone at 298 K were measured. It was shown that dissolution is accompanied by the exothermic effect at high concentrations of the polymer and by the endothermic effect in the case of dilute solutions. The approximation of the enthalpies of dissolution of blends in terms of the UNIQUAC semiempirical solution model made it possible to distinguish between contributions to the enthalpy of mixing related to the interaction of blend components and to the glassy structure of the polymer. The interaction enthalpy is positive for PVC solutions in dimethyl phthalate and is close to zero for PVC solutions in diethyl phthalate; for the other dialkyl phthalates, this parameter becomes more negative with increasing length of the alkyl radical. This trend correlates with the enhancement of the plasticizing effect in the series of phthalates under examination.

Author keywords:

нет данных

DOI:

нет данных

Web of Science ID:

ISI:000179766900017

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	NOV
Publisher	INTERPERIODICA
Address	PO BOX 1831, BIRMINGHAM, AL 35201-1831 USA
Language	English
Research-Areas	Polymer Science
Web-of-Science-Categories	Polymer Science
Number-of-Cited-References	24
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	5
Journal-ISO	Polym. Sci. Ser. A
Doc-Delivery-Number	624NX