Hygrothermal aging at elevated temperatures tends to induce degradation in epoxy resins. To predict the effects of this degradation, a knowledge of absorption and transport behavior of water is needed. In this work, a model material (DGEBA/ DDA) has been employed to study the water absorption and ab
Physical degradation by water clustering in epoxy resins
β Scribed by C. Carfagna; A. Apicella
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 273 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0021-8995
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β¦ Synopsis
Water uptakes in sorption experiments on thin sheets of epoxy resins have been explained on the basis of theoretical models. The occurrence of an irreversible void formation process at higher humidities induces strong deviations from the Flory-Huggins analysis. This phenomenon can be successfully explained on the basis of cluster formation.
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Dielectric, gravimetric, dynamic mechanical, and infrared measurements are reported on the effect of different stoichiometric ratios on the water absorption of diglycidyl ether of bisphenol A (DGEBA), MY720 (Ciba Geigy) cured with stoichiometric variations of triethylenetetramine (TETA), (BDH). Resi