Flory-Huggins parameter of interaction in polyelectrolyle solutions of chitosan and its alkylated derivative / Safronov AP,Zubarev AY // POLYMER. - 2002. - V. 43, l. 3. - P. 743-748.

ISSN/EISSN:

0032-3861 / нет данных

Type:

Article

Abstract:

The enthalpy of dilution of chitosan and alkylchitosan solutions in aqueous 0.3 M acetic acid was experimentally studied over the entire concentration range at 298 K, and the values of Flory-Huggins interaction parameter were determined with the help of a new scaling approach which took into account the electrostatic contribution to the enthalpy of dilution of polyelectrolyte solutions. That made it possible to estimate separately the excluded volume contribution to the enthalpy of dilution and, thus, to calculate the values of chi which appeared to be -0.01 for chitosan and -0.21 for alkylchitosan. It was found out that chi did not depend on the presence of salt in the solution. The hydrophobic modification of chitosan enhanced interaction with water due to the hydrophobic hydration in the aqueous solution. (C) 2001 Elsevier Science Ltd. All rights reserved.

Author keywords:

enthalpy of dilution; calorimetry; polyelectrolytes CRITICAL SOLUTION TEMPERATURE; HYDRATION

DOI:

10.1016/S0032-3861(01)00513-4

Web of Science ID:

ISI:000172607500011

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	ELSEVIER SCI LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Language	English
Keywords-Plus	CRITICAL SOLUTION TEMPERATURE; HYDRATION
Research-Areas	Polymer Science
Web-of-Science-Categories	Polymer Science
ResearcherID-Numbers	Zubarev, Adrey/B-4752-2014
Number-of-Cited-References	20
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	8
Journal-ISO	Polymer
Doc-Delivery-Number	500CC