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Physical aging in epoxy matrices and composites

  • Eric Siu-Wai Kong
Conference paper
Part of the Advances in Polymer Science book series (POLYMER, volume 80)

Abstract

Matrix-dominated physical and mechanical properties of a carbon-fiber-reinforced epoxy composite and a neat epoxy resin have been found to be affected by sub-Tg annealing in an inert dark atmosphere. Postcured specimens of Thornel 300 carbon-fiber/Fiberite 934 epoxy as well as Fiberite 934 epoxy resin were quenched from above Tq and annealed at 140 °C, 110 °C or 80 °C, for times up to 105 minutes. No weight gain or loss was observed during annealing at these temperatures. Significant variations were found in density, modulus, hardness, damping, moisture absorption ability, and thermal expansivity. Moisture/epoxy interactions were also studied. The kinetics of aging as well as the molecular aggregation during this densification process were monitored by differential scanning calorimetry, dynamic mechanical analysis, tensile testing, and solid state nuclear magnetic resonance spectroscopy.

Keywords

Nuclear Magnetic Resonance Spectrum Free Volume Dynamic Mechanical Analysis Crosslink Density Epoxy Matrix 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • Eric Siu-Wai Kong
    • 1
  1. 1.Hewlett-Packard LaboratoriesPalo AltoUSA

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