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Time–temperature–transformation (TTT) cure diagrams: Relationship between T g and the temperature and time of cure for a polyamic acid/polyimide system
Author(s) -
Palmese G. R.,
Gillham J. K.
Publication year - 1987
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.1987.070340511
Subject(s) - vitrification , polyimide , isothermal process , materials science , glass transition , isothermal transformation diagram , solvent , polymer chemistry , thermodynamics , composite material , chemical engineering , polymer , chemistry , organic chemistry , microstructure , medicine , austenite , bainite , physics , layer (electronics) , engineering , andrology
Glass transition temperatures ( T g ) were obtained vs. isothermal temperature ( T cure ) and time of cure for a polyamic acid/polyimide system. A time–temperature–transformation (TTT) isothermal cure diagram was constructed to include the time to vitrification and iso‐ T g curves. As for expoxies, the relationship between T cure and the time to vitrification is S‐shaped. Plots of T g vs. T cure show that solvent evaporation and chemical reaction are controlled by vitrification.