The origin of residual internal stress in solvent-cast thermoplastic coatings

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AuthorSearch for:
TypeArticle
Journal titleJournal of Applied Polymer Science
ISSN0021-8995
Volume23
Pages847858; # of pages: 12
Subjectresidual stresses; coating (process); solvents; polymeric materials; drying; paints; Buildings; contrainte residuelle; revetement (procede); solvant; materiau polymerique; sechage; peinture
AbstractExperiments on polystyrene and poly(isobutyl methacrylate) coatings cast from toluene have shown that residual internal stress is independent of dried coating thickness and initial solution concentration. A theory is presented that predicts the magnitude of the stress and shows that it has no dependence on thickness or initial solution concentration. Internal strain is calculated from the volume of solvent lost after the coating has solidified. This solidification point is identified with the solvent concentration that is sufficient to depress the glass transition of the polymer to the prevailing experimental temperature. A one-to-one correlation is confirmed between the volume of solvent lost from solution during drying and the volume change of the polymer film.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-839
NRC number17453
270
NPARC number20374700
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Record identifierd46aab94-e311-456d-a326-8feab1c05d50
Record created2012-07-23
Record modified2016-05-09
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