Kompozycje epoksydowe sieciowane kompleksami imidazoli z kationem Cu(II)

R. Pilawka; T. Spychaj; A. Leistner; M. El Fray

Published : 2022-08-23

Vol. 53 No. 7-8 (2008)

Epoxy compositions and materials cured with complexes of imidazoles and Cu(II) cations

R. Pilawka T. Spychaj A. Leistner M. El Fray

Abstract

The compositions of Epidian 6 epoxy resin cured with latent hardeners: complexes of imidazoles [2-methylimidazole (2M) or 2-ethyl-4-methylimidazole (2E4M)] with Cu(II) cations, or for comparison with Mg(II) cation and non-complexed 2M or 2E4M imidazoles (Table 1), were prepared. Pot lifetime and thermal parameters characterizing curing process, namely enthalpy and temperature of maximum heat effect (Table 1 and 2, Fig. 1) were investigated. The use of complexes of imidazoles with Cu(II) cation shifts this temperature upward 35-49°C and extends pot lifetime of the composition at ambient temperature even 30 times. Static mechanical properties at tension and bending of casts made of the compositions discussed were determined (Table 3 and 4). Shear strength of adhesive joints based on the compositions has been evaluated. Shear strength at room temperature does not depend on curing agent type. However, at temp. 120°C complexes of latent hardeners let reach much better shear strength than that caused by non-complexed imidazoles, especially 2M (Table 5).

Keywords

żywica epoksydowa ; utwardzacz utajony ; kompleks imidazolu z kationem Cu(II) ; czas życia kompozycji ; statyczne właściwości mechaniczne ; spoiny klejowe ; wytrzymałość na ścinanie epoxy resin ; latent hardener ; complex of imidazole with Cu(II) ; pot lifetime of a composition ; static mechanical properties ; adhesive joints ; shear strength

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Pilawka, R., Spychaj, T., Leistner, A., & El Fray, M. (2022). Epoxy compositions and materials cured with complexes of imidazoles and Cu(II) cations. Polimery, 53(7-8), 526–530. Retrieved from https://ichp.vot.pl/index.php/p/article/view/1337

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R. Pilawka polimery@ichp.pl

T. Spychaj

Affiliation
Politechnika Szczecińska, Instytut Polimerów, ul. Pułaskiego 10, 70-322 Szczecin

A. Leistner

M. El Fray