Phase separation of polymer solutions. The calculation of the cloudpoint curve with a concentration and temperature-dependent free energy correction parameter

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Emmerik, P.T. van and Smolders, C.A. (1973) Phase separation of polymer solutions. The calculation of the cloudpoint curve with a concentration and temperature-dependent free energy correction parameter. European Polymer Journal, 9 (25). pp. 157-167. ISSN 0014-3057

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Abstract:The free enthalpy correction parameter g in the Flory-Huggins equation for the Gibbs free enthalpy of mixing in polymer solutions is considered generally as a concentration- and temperature-independent parameter. It has been extended here with linear concentration- and temperature-dependent terms. With these parameters, six different types of cloudpoint curves can be predicted. Using the experimental cloudpoint curve for solutions of poly(2,6-dimethyl-1,4-phenylene oxide) in toluene up to about 70 per cent by weight of polymer, a set of g-parameters is obtained, accounting for concentration and temperature dependence. With the parameters thus obtained, the melting point curve has been calculated which agrees very well with the experimental melting points for this system.
Item Type:Article
Copyright:© 1973 Elsevier Science
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Link to this item:http://purl.utwente.nl/publications/68176
Official URL:http://dx.doi.org/10.1016/0014-3057(73)90138-9
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