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

Abstract

Glass transition temperatures (Tg) were obtained versus isothermal temperature (Tcure) 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-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.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1987
Accession Number
ADA183385

Entities

People

  • G. R. Palmese
  • J. K. Gillham

Organizations

  • Princeton University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Body Weight
  • Boiling Point
  • Chemical Engineering
  • Chemical Kinetics
  • Chemical Reactions
  • Chemistry
  • Critical Temperature
  • Diagrams
  • Engineering
  • Gelation
  • Glass Transition Temperature
  • High Temperature
  • Materials
  • Military Research
  • Phase Transformations
  • Polymers
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Polymer Science and Engineering.