에폭시 수지 시스템의 기계 및 열적 특성에 관한 연구

Abstract

The mechanical and thermomechanical properties of two epoxy structural adhesives, IPCO 9923 and HYSOL EA 9309.2 NA, and one epoxy matrix resin, SKR 2514 were tested and compared. The mechanical properties such as, the tensile, lap and bulk shear were measured at room temperature, and the measurement of the thermomechanical properties carried out from room temperature up to of 250℃ by using dynamic mechanical analyses. It was found from the experimental results that HYSOL EA 9309.2 NA has better performance in static properties at room temperature and also in thermal properties at elevated temperature than those of IPCO 9923, and tensile and shear strength of SKR 2514 epoxy resin was 1.5 times higher than those of two structural adhesive systems. The storage moduli of SKR 2614 epoxy resin systems were decreased drastically above the temperatures of resin cure, and the damping coefficients of the resin were increased rapidly at the elevated temperature beyond the cure points of the resin, having maximum value near the glass transition temperature of the resin.