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Epoxy resin / ionic liquid systems / Honorata Maka in Industrial & engineering chemistry research, Vol. 51 N° 14 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5197-5206 Titre : Epoxy resin / ionic liquid systems : The influence of imidazolium cation size and anion type on reactivity and thermomechanical properties Type de document : texte imprimé Auteurs : Honorata Maka, Auteur ; Tadeusz Spychaj, Auteur ; Ryszard Pilawka, Auteur Année de publication : 2012 Article en page(s) : pp. 5197-5206 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermomechanical  properties  Chemical  reactivity  Ionic  liquid Résumé : The epoxy compositions with ionic liquids (ILs) differing in the alkyl chain length of imidazolium cation (butyl or decyl), anion type [N(CN)2―, BF4―, Cl―], as well as ILs concentration (1, 3, and 9 phr) have been prepared, and their curing characteristics at ambient and elevated temperatures have been investigated Rheometric, differential scanning calorimetry, and Fourier transform infrared measurements revealed substantial differences in the curing characteristics dependent mainly on the IL anion type and its concentration. TGA results showed that thermal decomposition of IL influenced the onset temperature of epoxy resins cross-linking reactions during heat treatment. Dynamic mechanical thermal analysis measurements showed that the type of IL anion had an effect on T8 and tan δ values as well. For materials cross-linked with ILs containing dicyanamide anion the highest Tg (ca. 170 °C) and the lowest tan δ (0.26) values have been found. On the basis of the obtained results and literature data the mechanism of epoxy resin cross-linking in the presence of imidazolium ionic liquids has been proposed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25783428 [article] Epoxy resin / ionic liquid systems : The influence of imidazolium cation size and anion type on reactivity and thermomechanical properties [texte imprimé] / Honorata Maka, Auteur ; Tadeusz Spychaj, Auteur ; Ryszard Pilawka, Auteur . - 2012 . - pp. 5197-5206. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5197-5206 Mots-clés : Thermomechanical  properties  Chemical  reactivity  Ionic  liquid Résumé : The epoxy compositions with ionic liquids (ILs) differing in the alkyl chain length of imidazolium cation (butyl or decyl), anion type [N(CN)2―, BF4―, Cl―], as well as ILs concentration (1, 3, and 9 phr) have been prepared, and their curing characteristics at ambient and elevated temperatures have been investigated Rheometric, differential scanning calorimetry, and Fourier transform infrared measurements revealed substantial differences in the curing characteristics dependent mainly on the IL anion type and its concentration. TGA results showed that thermal decomposition of IL influenced the onset temperature of epoxy resins cross-linking reactions during heat treatment. Dynamic mechanical thermal analysis measurements showed that the type of IL anion had an effect on T8 and tan δ values as well. For materials cross-linked with ILs containing dicyanamide anion the highest Tg (ca. 170 °C) and the lowest tan δ (0.26) values have been found. On the basis of the obtained results and literature data the mechanism of epoxy resin cross-linking in the presence of imidazolium ionic liquids has been proposed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25783428