THERMODYNAMICS OF THE INTERACTION OF POLYACRYLIC-ACID WITH WATER / SAFRONOV AP,TAGER AA,KLYUZHIN ES,ADAMOVA LV // VYSOKOMOLEKULYARNYE SOEDINENIYA SERIYA A \& SERIYA B. - 1993. - V. 35, l. 6. - P. A700-A704.

ISSN/EISSN:

0507-5475 / нет данных

Type:

Article

Abstract:

The Gibbs energies, enthalpies, and entropies of mixing water with polyacrylic acid (PAA) having a molecular mass (MM) in the range from 4 x 10(3) to 2 x 10(6) were determined over the entire range of compositions. The plots of the enthalpy and entropy of mixing versus the solution composition have shapes that have not been reported earlier for polymer solutions: the curves for all MMs exhibit additional minima and maxima at a PAA content of 65 - 75\% in the solution. The results were analyzed taking into account the glassy state of PAA, interactions between AA units and water molecules, UCST and LCST criteria, and conformational changes in PAA. It is suggested that the observed additional extrema in the concentration dependence of enthalpy and entropy of mixing are due to the conformational transitions in PAA macromolecules.

Author keywords:

AQUEOUS-SOLUTIONS

DOI:

нет данных

Web of Science ID:

ISI:A1993LM71100020

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	MEZHDUNARODNAYA KNIGA
Address	39 DIMITROVA UL., 113095 MOSCOW, RUSSIA
Language	Russian
Keywords-Plus	AQUEOUS-SOLUTIONS
Research-Areas	Polymer Science
Web-of-Science-Categories	Polymer Science
Number-of-Cited-References	18
Usage-Count-Since-2013	3
Journal-ISO	Vysokomol. Soedin.
Doc-Delivery-Number	LM711