Abstract
Heats of solution of Polyvinylalcohol (PVA) and Polyvinyl-acetate (PVAc) in Water and Dioxane have been measured by using an isothermal titration calorimeter. The χ H- parameter of the Flory-Huggins-theory has been evaluated from the calorimetric data. The system PVA + H 2O shows negative χ H values and the system PVAc + Dioxane shows positive χ H - values corresponding to exothermic and endothermic heats of dilution repectively.
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