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Irreversible effects of hygrothermal aging on DGEBA/DDA epoxy resin

โœ Scribed by G. Z. Xiao; M. E. R. Shanahan

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
168 KB
Volume
69
Category
Article
ISSN
0021-8995

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โœฆ Synopsis

Irreversible hygrothermal aging effects on DGEBA/DDA epoxy resin were studied by FTIR, gravimetric tests, and DMTA. The results show that water immersion at 50, 70, and 90ะŠC leads to the introduction of carbonyl groups in the resin and chain scission of the crosslinked structure. These irreversible structural changes induce the addition of water to the polymer initially and weight loss of the material eventually. They also lead to the irreversible decrease of the glass transition temperature of DGEBA/DDA.

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Irreversible interactions between water
Irreversible interactions between water and DGEBA/DDA epoxy resin during hygrothermal aging
โœ G. Z. Xiao; M. Delamar; M.E.R. Shanahan ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 242 KB ๐Ÿ‘ 1 views

Two approaches were adopted to examine the irreversible interactions between water and a model epoxy resin (DGEBA/DDA). One was to employ XPS to investigate the changes of the chemical structure of the resin after immersion in water at a temperature of 90ะŠC and followed by completely drying. The oth