Title: Thermodynamic stability of immiscible polymer blends
Authors: Vanhee, S ×
Koningsveld, R
Berghmans, Hugo
Solc, K
Stockmayer, WH #
Issue Date: Jan-2000
Publisher: Amer chemical soc
Series Title: Macromolecules vol:33 issue:10 pages:3924-3931
Abstract: Calculations based on an extended Flory-Huggins-Staverman model demonstrate that miscibility gaps in virtually immiscible blends may encompass a complex pattern of metastable and unstable equilibria that differ little in Gibbs free energy. Examples are given that demonstrate the development of near immiscibility by sideways coalescence of upper-critical and lower-critical gaps upon an increase of the chain lengths of the constituents. The mechanisms of merging are discussed, as well as the effect of chain-length distribution and copolymer composition. The conceivable occurrence of nonstable equilibria may lead to a change in physical properties of immiscible blends with time, here called thermodynamic aging of the second kind.
ISSN: 0024-9297
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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