Abstract
The lattice-fluid theory is combined with the Gibbs-DiMarzio theory to predict the compositional variation of glass transition temperatures in polymer mixtures. This approach is tested for two miscible blend systems, poly(2,6-dimethyl-1,4-phenylene ether)/polystyrene and poly(bisphenol A hydroxy ether)/poly(vinyl methyl ether). Some modification of the lattice-fluid theory is required to reduce the difference between theory and experimental data for the glass transition temperature. It reveals that the compositional variation of glass transition temperatures are mainly governed by both the interaction between the constituents and the chain flexibility change with composition.
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Kwon, I., Jo, W. The Equation of State Theory for Glass Transition Temperature in Miscible Polymer Blends. Polym J 24, 625–632 (1992). https://doi.org/10.1295/polymj.24.625
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DOI: https://doi.org/10.1295/polymj.24.625