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Softening temperature of glassy polymers as affected by residual stresses
Author(s) -
Siegmann A.,
Narkis M.,
Rosenzweig N.
Publication year - 1979
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.760190310
Subject(s) - vicat softening point , crazing , materials science , softening point , residual stress , softening , composite material , polymer , polystyrene , residual , algorithm , computer science
Heat deflection temperature and Vicat softening point of polystyrene and polymethylmethacrylate with various thermal histories were measured. Surface residual stresses were characterized by liquid crazing. Residual stress profiles across the sample thickness were also measured. It is suggested that the softening behavior of glassy polymers is affected by the state of the residual stresses in addition to the traditionally accepted free volume approach.