Effects of the Degree of Dispersion and the Morphology of Zinc Powder on the Thermodynamics of Its Interaction with Polystyrene in Solution and in Composite Films / Istomina A. S.,Safronov A. P.,Timoshenkova O. R.,Pastukhov A. V. // POLYMER SCIENCE SERIES A. - 2010. - V. 52, l. 9. - P. 930-938.

ISSN/EISSN:

0965-545X / нет данных

Type:

Article

Abstract:

The adsorption of block PS on the surface of spherical, round, and flaky particles of highly dispersed Zn powders with dimensions of 3.5-23 mu m and the interaction of the polymer with the surface of Zn powders in the composite films are studied by refractometry and isothermal calorimetry. During establishment of adsorption equilibrium, the concentration of PS in the bulk of solution increases, while, near the surface of Zn particles, the concentration of PS decreases, thus indicating the predominance of absorption from solution of the solvent o-xylene. With the use of the thermodynamic cycle, including processes of solution of the polymer and Zn-PS film composite and wetting of the Zn powder, the enthalpies of formation of PS-Zn composites are estimated. The enthalpies of mixing of filled compositions comprise two contributions of opposite signs: In the low-filling region, the negative contribution of adhesion interactions prevails, while in the region of high-filled compositions, a positive structural contribution, which is associated with additional loosening of the glassy packing of PS near the filler surface, plays the decisive role. The contribution of adhesion interaction is largely determined by the dimensions of filler particles, while the structural contribution is controlled by their shape. The experimental evidence suggests that spherical particles possess the highest thermodynamic compatibility with the polymer matrix of the composite material.

Author keywords:

нет данных

DOI:

10.1134/S0965545X10090087

Web of Science ID:

ISI:000286638300008

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	SEP
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Research-Areas	Polymer Science
Web-of-Science-Categories	Polymer Science
Author-Email	aigul-1407@mail.ru
Funding-Acknowledgement	federal special-purpose programs Development of the Scientific Potential of the Higher School {[}2.1.1/1535]; Scientific and Educational Specialists of Innovation Russia {[}02.740.11.0148, NK-43P]
Funding-Text	This work was supported by the federal special-purpose programs Development of the Scientific Potential of the Higher School (grant 2.1.1/1535) and Scientific and Educational Specialists of Innovation Russia (State Contract 02.740.11.0148, project NK-43P).
Number-of-Cited-References	15
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	6
Journal-ISO	Polym. Sci. Ser. A
Doc-Delivery-Number	712BZ