Accession Number:

ADA183385

Title:

Time-Temperature-Transformation (TTT) Cure Diagrams: Relationship between Tg and the Temperature and Time of Cure for a Polyamic Acid/Polyimide System.

Descriptive Note:

Technical rept. no. 12, 31 Dec 84-31 Dec 86,

Corporate Author:

PRINCETON UNIV NJ DEPT OF CHEMICAL ENGINEERING

Personal Author(s):

Report Date:

1987-07-01

Pagination or Media Count:

36.0

Abstract:

Glass transition temperatures Tg were obtained versus isothermal temperature Tcure and time of cure for a polyamic acidpolyimide system. A time temperature-transformation TTT isothermal cure diagram was constructed to include the time to vitrification and iso-Tg curves. As for epoxies, the relationship between Tcure and the time to vitrification is S -shaped. Plots of Tg versus Tcure show that solvent evaporation and chemical reaction are controlled by vitrification. Keywords Cure, Vitrification, Solvent evaporation, Polyimide, Polyamic acid.

Subject Categories:

  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE