The degree of dispersion of poly(vinyl alcohol) in water/n-propanol solutions |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;2. School of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, China;3. Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, China;4. Bomin electronics Ltd., Meizhou 514021, China |
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| Abstract: | 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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