Epoxy networks modified by multifunctional polyhedral oligomeric silsesquioxanes (POSS) containing amine groups |
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Authors: | I. E. dell’Erba R. J. J. Williams |
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Affiliation: | (1) Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), Av. J. B. Justo 4302, 7600 Mar del Plata, Argentina |
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Abstract: | The hydrolytic condensation of a precursor synthesized by the reaction of equimolar amounts of (3-aminopropyl)triethoxysilane and phenylglycidylether led to a distribution of polyhedral oligomeric silsesquioxanes (POSS) containing 8–11 Si atoms, functionalized with amine groups. About 57% of the NH functionalities were active for reaction with epoxy groups. The multifunctional amine-POSS was used to modify an epoxy network obtained by the homopolymerization of diglycidylether of bisphenol A initiated by benzyldimethylamine. The main effect of POSS modification was an increase in both the glassy and rubbery modulus explained, respectively, by the increase in cohesive energy and crosslink densities. |
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Keywords: | amine-functionalized POSS dynamic-mechanical analysis epoxy network silsesquioxane |
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