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Investigations on the dissociation behaviour of hydrolyzed alternating copolymers of maleic anhydride and propene—II. Viscometric behaviour

✍ Scribed by Steffi Reinhardt; Volker Steinert; Kirsten Werner

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 401 KB
Volume: 32
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(96)00029-8

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✦ Synopsis

The viscometric behaviour of hydrolyzed propene maleic anhydride copolymers of different molecular weights has been investigated in aqueous solution as a function of polymer concentration, degree of neutralization, concentration of added salt (NaCI) and temperature, respectively. In salt free solutions the reduced viscosity increases with decreasing polymer concentration. Addition of salt to the solutions restores conformity with the Huggins' equation. At constant degree of neutralization the intrinsic viscosity was found to have an inverse square-root dependence on salt concentration. The dependence of the viscosity on the degree of neutralization indicates a maximum at half the degree of neutralization. This maximum disappears with decreasing molecular weight. The behaviour of the copolymer at pressure filtration through a polypropene membrane filter was compared with the results of viscometry.

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