The present work investigates the influence of cure schedule on the dynamic mechanical behavior and thermal degradation of crosslinked mono- and diepoxides obtained in epoxidation of commercially available divinylbenzene by 60% hydrogen peroxide as the oxidant in the presence of organic solvents (acetonitrile and methanol) and the catalyst magnesium oxide. The crosslinking process of the obtained mono- and diepoxides was accomplished using three different hardening agents: glutaric anhydride, 2,4,6-tri(dimethylaminomethyl)phenol, and maleic anhydride. The influence of cure schedule and hardening agent on the dynamic mechanical properties like storage modulus, tan delta, glass transition temperature (T-g), and thermal stability of cured epoxides has been studied by dynamic mechanical analyzer (DMA), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The variations obtained in the elastic modulus in the rubber region above the glass transition have been used to analyze the crosslink density of the networks. (c) 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 462-469, 2007