Amine-randomised poly(2-ethylhexyl acrylate) as impact and adhesive modifier for epoxy resin

摘要

The adhesive and impact properties of cured epoxy resins, modified with amine-randomised poly(2-ethylexyl acrylate) (ARPEHA) liquid rebber, as a function of the concentration of the liquid rubber, have been investigated. ARPEHA was synthesised by the reaction of the carboxyl-randomised poly(2-ethylhexyl acrylate) (CRPEHA) liquid rubber with 4,4'-diaminodiphenyl sulphone.crpeha was synthesised by solution co-polymerisation of 2-ethylhexyl acrylate and acrylic acid. ARPEHA modified cured epoxy resins were formed by curing with an ambient temperature-curing agent, triethylene tetramine. The modified epoxy resins were evaluated with respect to their dadhesive and ipact properties. The optimum properties were obtained at around 12.5 phr (parts per hundred parts of epoxy resin) of modifier. Analysis of the fracture surface using scanning electron microscopy indicated the presence of two-phase microstructures.