Evaluation of structural changes in epoxy systems by moisture sorption-desorption and dynamic mechanical studies
✍ Scribed by W. J. Mikols; J. C. Seferis; A. Apicella; L. Nicolais
- Publisher
- Society for Plastic Engineers
- Year
- 1982
- Tongue
- English
- Weight
- 663 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0272-8397
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✦ Synopsis
Abstract
This work forms a basis for relating moisture solubilities and dynamic mechanical properties to the hygrothermal history of epoxy systems. Two different classes of epoxy systems were investigated; a low‐performance epoxy (DGEBA‐TETA) and a high‐performance system (TGDDM‐DDS) commonly used in carbon fiber composites. An increase in the equilibrium moisture content from TGDDM‐DDS epoxy samples having various DDS compositions was observed as a result of thermal cycling in a liquid environment. Interpretation of the experimental results suggest that hygrothermal interactions produce changes in the epoxy network structure and result in the observed moisture sorption behavior.