Torsional Braid Analysis (TBA): Time-Temperature-Transformation (TTT) Cure Diagrams of Thermosetting Epoxy/Amine Systems.

Abstract

The conversion of liquid resin to solid thermoset during the process of cure can be monitored using a substrate coated with the reactive system as the specimen in a torsion pendulum experiment (TBA). Measurement of times to gelation and vitrification at a series of temperatures results in an isothermal time-temperature-transformation (TTT) cure diagram which can be used for comparing different systems. In this report molecular and macroscopic TTT cure diagrams are considered: it is demonstrated that TBA is a convenient method for generating macroscopic TTT cure diagrams. The influence of chemical structure on the kinetics and macroscopic properties was investigated by comparing aliphatic and aromatic tetrafunctional amines with diepoxides of varying molecular weights. The paper also describes automation of the TBA instrument using a desk-top calculator. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1982
Accession Number
ADA119836

Entities

People

  • John B. Enns
  • John K. Gillham

Organizations

  • Princeton University

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  • Energy and Power Technologies
  • Weapons Technologies

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  • Chemical Engineering
  • Chemistry
  • Composite Materials
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  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Military Research
  • Plastics
  • Polymer Chemistry
  • Polymers
  • Resins
  • Thermosetting Plastics

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  • Materials science

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  • Computer Science.
  • Polymer Science and Engineering.