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Thermal properties of drawn polytetrafluoroethylene
Author(s) -
Grebowicz J.,
Pan R.,
Wunderlich B.
Publication year - 1989
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.1989.070380409
Subject(s) - polytetrafluoroethylene , crystallinity , materials science , composite material , metastability , melting point , amorphous solid , thermal , thermal analysis , polymerization , crystal (programming language) , polymer chemistry , polymer , chemistry , thermodynamics , crystallography , organic chemistry , physics , computer science , programming language
Polytetrafluoroethylene as polymerized (virgin) was drawn, sintered, and annealed. By thermal analysis the changes in crystal type and crystallinity and melting kinetics was analyzed. It is shown that this analysis permits control and optimization of the various processes. In addition, a new, high melting polytetrafluoroethylene (654 K) is described. It is assumed to be metastable due to strain in the surrounding amorphous fraction.