Reversible influence of moisture on epoxy-diane resin DER-330 hardened by diaminodiphenylsulfon was investigated. Moisture transfer was modeled using Fick's second law. The influence of moisture evaporation on characteristic values of transfer temperature was analyzed. The Young dynamic modulus increased within the whole region of glassy state of epoxide polymer containing polyisocyanate additive which was dried after moistening. The transition region related to molecular mobility of kinetic segments interacting with moisture was found and characterized.
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