Epoxy-Based Networks Combining Chemical and Supramolecular Hydrogen-Bonding Crosslinks

We combine the supramolecular chemistry of heterocyclic ureas with the chemistry of epoxides to synthesize new crosslinked materials incorporating both chemical and supramolecular hydrogen-bonded links. A two-step facile and Solvent-free procedure is used to obtain chemically and thermally stable networks from widely available ingredients: epoxy resins and fatty acids. The density of both chemical and physical crosslinks is controlled by the stoichiometry of the reactants and the use of a proper catalyst to limit side reactions. Depending on the stoichiometry, a wide range of thermomechanical properties can be attained. The method can be used to produce elastomeric objects of complex shapes. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1133-1141, 2010