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Solution Properties of Partially Hydrolysed Polyacrylamide and Chitosan Mixed Solutions
Author(s) -
Lima Vidal Rosangela Regia,
Pereira Fagundes Fábio,
Cabral de Menezes Sonia Maria,
Machado da Silva Ruiz Naira,
Balaban Garcia Rosangela
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200551114
Subject(s) - conductometry , polyacrylamide , titration , polymer , aqueous solution , hydrolysis , chemistry , viscosity , rheology , chitosan , chemical engineering , salt (chemistry) , stoichiometry , isoelectric point , intrinsic viscosity , polymer chemistry , chromatography , inorganic chemistry , materials science , organic chemistry , composite material , engineering , enzyme
Abstract Summary: In this paper, the properties of a partially hydrolysed polyacrylamide with a low charge density and chitosan mixtures were evaluated in an aqueous acid solution. The formation of a soluble complex was followed by conductometry and potentiometry, and the stoichiometry at the titration endpoint was investigated as a function of the polyanion added. The influence of salts on the titration endpoint and on the rheological behavior of the mixed solutions was also studied. The mixture of equal concentration of both polymers, in the absence of salt, presented synergy, with a significant viscosity increase. Nevertheless, in the presence of salts, this mixture presented minimum viscosity. These results were discussed as a function of the polymers structural features and the environment used in the study.