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A study of the dicyandiamide–epoxidian oligomer system curing in the presence of asymmetric urea by pulsed NMR

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Abstract

Catalyzed epoxy systems comprising epoxidian oligomer ED-20, dicyandiamide (DCDA) as a curing catalyst and asymmetric urea as an accelerator (Dyhard-UR500) were studied by pulsed NMR. It was shown that full curing of the epoxy composition with formation of a rigid three-dimensional network is achieved when cured in the conditions specified in the previous works of the authors. While at 80°C curing reaction practically does not proceed, thermostating of the composition for 6.5 h at 110°C leads to the formation of a physical network in partially cured epoxy matrix.

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Authors and Affiliations

  1. Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials (VIAM), State Research Center of the Russian Federation, ul. Radio 17, Moscow, 105005, Russia

    L. V. Chursova, A. I. Tkachuk, N. N. Panina, Ya. M. Gurevich & A. N. Babin

  2. Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432, Russia

    G. V. Malkov

Authors
  1. L. V. Chursova
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  2. A. I. Tkachuk
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  3. N. N. Panina
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  4. Ya. M. Gurevich
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  5. A. N. Babin
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  6. G. V. Malkov
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Corresponding author

Correspondence to A. I. Tkachuk.

Additional information

Original Russian Text © L.V. Chursova, A.I. Tkachuk, N.N. Panina, Ya.M. Gurevich, A.N. Babin, G.V. Malkov, 2015, published in Klei. Germetiki. Tekhnologii, 2015, No. 3, pp. 35–39.

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Chursova, L.V., Tkachuk, A.I., Panina, N.N. et al. A study of the dicyandiamide–epoxidian oligomer system curing in the presence of asymmetric urea by pulsed NMR. Polym. Sci. Ser. D 8, 266–269 (2015). https://doi.org/10.1134/S1995421215040048

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  • DOI: https://doi.org/10.1134/S1995421215040048

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