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Mechanical relaxations of poly(vinylidene fluoride) and some of its copolymers
Author(s) -
Kalfoglou Nikos K.,
Williams H. Leverne
Publication year - 1973
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1973.070171111
Subject(s) - copolymer , chlorotrifluoroethylene , crystallinity , fluoride , materials science , relaxation (psychology) , polymer chemistry , polymer , thermodynamics , composite material , chemistry , inorganic chemistry , tetrafluoroethylene , social psychology , psychology , physics
The dynamic mechanical properties of poly(vinylidene fluoride) have been studied under isochronal conditions and the effect of thermal treatment examined. The results are compared with a product of different molecular weight distribution. The study also included the mechanical relaxation spectra of copolymers of vinylidene fluoride and chlorotrifluoroethylene at four compositions and four frequencies as a function of temperature. The thermodynamic parameters associated with the main relaxations were determined and the results discussed on the basis of available information on the drgree of crystallinity, copolymer heterogeneity, and main chain flexibility.