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Prediction of phase separation behaviour from thermodynamic measurements in the one phase region
Author(s) -
Higgins J. S.,
Fruitwala H.,
Tomlins P. E.
Publication year - 1988
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19880160122
Subject(s) - spinodal decomposition , thermodynamics , phase diagram , spinodal , materials science , mixing (physics) , gibbs free energy , phase (matter) , neutron scattering , enthalpy of mixing , small angle neutron scattering , scattering , chemistry , enthalpy , physics , optics , organic chemistry , quantum mechanics
When a polymer blend is heated to within the unstable region of the temperature ‐ composition diagram spinodal decomposition may be observed using small angle neutron scattering. In the one phase region scattering has been used to obtain the temperature and composition dependence of the second derivative with respect to composition of the Gibbs free energy of mixing. Correlation of these two types of measurement not only tests the current theories of spinodal decomposition, but provides insight into the molecular parameters controlling domain morphology in phase separation blends.