Investigation mechanical properties and Interlaminar shear strength of epoxy / glass prepreg based on bi-component epoxy resins

In this paper, the mechanical properties of system ۱ and ۲ resins with liquid epoxy resin were investigated using the tensile test. The results show that by increasing the percentage of resin with low molecular weight in the formulation, it reduces the length of crosslinks, reduces the mobility of chains and increases the tensile modulus in the formulation. Increasing the percentage of high molecular weight epoxy resin also increases the tensile modulus of the formulation due to the increase in the length of the crosslinks, the increase in the mobility of the chains. Also, the results of interlayer shear strength test show that in system ۱, due to the higher percentage of liquid resin in the formulation, it reduces the chain length of the formulation, reduces the crosslinks length and increases the Interlaminar shear strength of system ۱ compared to system ۲ by ۱۴%.

کلیدواژه ها:

bi-component epoxy resins ، Epoxy prepreg ، Interlaminar shear strength ، Mechanical properties