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An energy balance approach to solvent removal in polyamic acid coatings
Author(s) -
Bauer C. L.,
Farris R. J.
Publication year - 1989
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760292211
Subject(s) - solvent , materials science , coating , energy balance , strain energy , stress (linguistics) , chemical engineering , residual stress , composite material , thermodynamics , organic chemistry , chemistry , linguistics , physics , philosophy , finite element method , engineering
Using an energy balance approach incorporating a Flory‐Huggins expression for free energy and the strain energy of the material, the solvent removal process in liquid‐based coatings was shown to depend on stress and temperature. An equilibrium is obtained between residual solvent content and stress in the coating at a given temperature. Such stress‐dependent solvent removal behavior was observed with a polyamic acid coating solution‐cast using N‐methylpyrrolidinone.