The influence of composition of the dicyandiamide-asymmetric urea complex curing catalyst system on the thermal effect of the epoxy diane oligomer polymerization reaction

To decrease the curing temperature of epoxy compositions at the use of dicyandiamide (DCDA) as a latent hardener, a curing catalyst system including, in addition to DCDA, asymmetric urea has been studied. The dependencies of parameters of chemical transformations in catalyzed epoxy compositions, suc...

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Published inPolymer science. Series D, Glues and sealing materials Vol. 8; no. 3; pp. 193 - 198
Main Authors Tkachuk, A. I., Chursova, L. V., Panina, N. N., Gurevich, Ya. M., Babin, A. N., Malkov, G. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 28.07.2015
Subjects
Chemistry
Chemistry and Materials Science
Polymer Sciences
latent curing systems
epoxy binders
polymeric composite materials
asymmetric ureas
curing catalysts
dicyandiamide
thermal effects of reaction
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Summary:To decrease the curing temperature of epoxy compositions at the use of dicyandiamide (DCDA) as a latent hardener, a curing catalyst system including, in addition to DCDA, asymmetric urea has been studied. The dependencies of parameters of chemical transformations in catalyzed epoxy compositions, such as thermal effects and conversion, on the composition of the complex curing catalyst system have been established by the DSC and isothermal calorimetry techniques. It has been shown that the chosen optimal composition of the catalyst system allows curing the epoxy compositions in a two-stage regime at lower temperatures than in the case of the use of DCDA.
ISSN:1995-4212
1995-4220
DOI:10.1134/S1995421215030168