Cure and Properties of Thermosetting Polymers.

Abstract

Thermosetting materials (e.g., epoxies and polyimides) are used in composites, coatings and adhesives. Unlike their thermoplastic counterparts, molecular structure macroscopic property relationships in thermosets are not well developed: hence the current research. A general model for thermosetting materials which relates polymerization to properties is being developed. In this, a time temperature transformation (TTT) cure diagram relates the principal states of matter encountered (i.e., liquid, rubber (sol/gel and gel), and glass (sol, sol/gel and gel) to gelation and vitrification phenomena. The model is extended to rubber-modified thermosetting systems to show that a given chemical formulation can provide different morphologies and hence different material behavior. It is also extended to high temperature polymers where polymerization and degradation reactions compete. Computed and experimental TTT diagrams are compared.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1987
Accession Number
ADA184669

Entities

People

  • John K. Gillham

Organizations

  • Princeton University

Tags

DTIC Thesaurus Topics

  • Amorphous Materials
  • Chemical Engineering
  • Composite Materials
  • Degradation
  • Engineering
  • Epoxy Resins
  • Glass
  • Glass Transition Temperature
  • High Temperature
  • Materials
  • Military Research
  • Polymerization
  • Polymers
  • Reaction Mechanisms
  • Resins
  • Scientists
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Polymer Science and Engineering.
  • Theoretical Analysis.

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference
  • AI & ML - Machine Learning Algorithms