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The degree of dispersion of poly(vinyl alcohol) in water/n-propanol solutions

✍ Scribed by D. Eagland; F.F. Vercauteren; Th.G. Scholte; W.A.B. Donners; M.D. Lechner; R. Mattern

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 450 KB
Volume: 22
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(86)90128-x

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✦ Synopsis

It is demonstrated that, although addition of n-propanol to aqueous poly(vinyl alcohol) solutions prevents their aging, the polymer is not present in a molecularly dispersed form. Further, it is shown that viscometry is not a suitable method to study the degree of dispersion of poly(vinyl alcohol) in water or water.n-propanol solution. The results of turbidity measurements as a function of poly(vinyl alcohol) concentration, n-propanol concentration and time suggest that it is a change of solvent quality rather than a specific interaction between polymer and n-propanol that is responsible for the suppression of aging effects.

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