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Enthalpies of solution of polyvinylalcohol in water and polyvinylacetate in dioxane
Institution:1. Department of Mechanical Engineering, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, India;2. Department of Mechanical Engineering, Meerut Institute of Engineering and Technology, Meerut, Uttar Pradesh, India;3. Department of Mechanical Engineering, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India;4. Natural Composite Research Group, Department of Materials and Production Engineering, The Sirindhorn International Thai–German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
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 χH- parameter of the Flory-Huggins-theory has been evaluated from the calorimetric data. The system PVA + H2O shows negative χH values and the system PVAc + Dioxane shows positive χH - values corresponding to exothermic and endothermic heats of dilution repectively.
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