THERMODYNAMICS OF COMPLEX-FORMATION OF POLYACRYLIC-ACID WITH POLY(N-VINYL-2-PYRROLIDONE) AND CHITOSAN

Authors
PEREZGRAMATGES A ARGUELLESMONAL W PENICHECOVAS C
Citation
A. Perezgramatges et al., THERMODYNAMICS OF COMPLEX-FORMATION OF POLYACRYLIC-ACID WITH POLY(N-VINYL-2-PYRROLIDONE) AND CHITOSAN, Polymer bulletin, 37(1), 1996, pp. 127-134
Citations number
16
Categorie Soggetti
Polymer Sciences
Journal title
Polymer bulletin → ACNP
ISSN journal
01700839
Volume
37
Issue
1
Year of publication
1996
Pages
127 - 134
Database
ISI
SICI code
0170-0839(1996)37:1<127:TOCOPW>2.0.ZU;2-7
Abstract
Interpolymer complexing of poly(acrylic acid) (PAA) with poly(N-vinyl- 2-pyrrolidone) (PVP) as well as with chitosans (CHI) of various chain lengths was studied at different temperatures by pH measurements. The degree of conversion (theta), the complex stability constant, K, and t he thermodynamic parameters of these reactions were evaluated. Complex ing proceeds cooperatively in both systems and values of theta near un ity are obtained for the higher molecular weight samples. The variatio n of K with theta for the PAA-CHI system indicates that this complex c omprises long sequences of bound pairs of monomer units.