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Time–temperature–transformation (TTT) cure diagrams: Relationship between Tg and the temperature and time of cure for a polyamic acid/polyimide system

✍ Scribed by G. R. Palmese; J. K. Gillham

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
717 KB
Volume
34
Category
Article
ISSN
0021-8995

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✦ Synopsis

Glass transition temperatures (2'') were obtained vs. isothermal temperature (T,,,,) and time of cure for a polyamic acid/polyimide system. A time-temperature-transformation (TIT) isothermal cure diagram was constructed to include the time to vitrification and "0-2'' curves. A s for epoxies, the relationship between T , , and the time to vitrification is S-shaped. Plots of TB vs. T,,,, show that solvent evaporation and chemical reaction are controlled by vitrification.

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