carboxy group

Crosslinking of epoxy-oligomeric mixtures has been studied at room temperature and at heating to 383, 403 and 423 K for 15, 30, 45, 60 and 75 min in the presence of polyethylenepolyamine. The mixtures consist of industrial ED-20 epoxy resin, oligoesteracrylate TGM-3 and carboxy-containing derivative of ED-24 epoxy resin. The effect of mixture composition, temperature and process time on the gel-fraction content and hardness of polymeric films has been examined. Using IR-spectroscopy the chemism of network formation has been determined.

Carboxy-containing peroxy oligomer (CPO) has been synthesized via the reaction of peroxy derivative of ED-24 epoxy resin with free peroxy and epoxy groups with adipic acid in the presence of benzyl triethylammonium chloride. The effect of catalyst amount, reaction temperature and process time on the reaction rate has been determined. The effective rate constants and activation energies have been calculated. CPO synthesis procedure has been developed. CPO structure has been confirmed by chemical and IR-spectroscopic analyses.