Investigation of Mechanical Properties of High Tg Epoxy Resin Material

抄録

This study introduces a new type of high Tg epoxy resin material. Firstly, the viscoelastic behavior of the resin material was investigated through dynamic mechanical analysis and the Tg value of the resin material was determined. Secondly, the effect of temperature and aging treatment on the mechanical properties of the resin material was investigated by tensile test. The results showed that as the temperature increases, the movement of the polymer chains in the resin material changes from obstruction to flow, and the Tg value is approximately 230℃. With an increase in the experimental temperature, the elastic modulus and tensile strength of the resin decrease, and the fracture strain increases. With an increase in the aging time, the elastic modulus of the resin increases, while the tensile strength and fracture strain decrease. This is due to the oxidative decomposition reaction of the resin with oxygen in the air during the aging process, which embrittles the resin material. FE-SEM analysis of the fracture surface after the tensile test was performed to determine the state of the resin material under different experimental conditions.