For solving such problems as low hardness

weak resistance to bird pecking of shed sheath material of silicon rubber composite insulator as well as weak adhesion between the core and sheath interface

the existing researchers have replaced silicone rubber material with alicylic epoxy resin material. During the period of making period of epoxy resin shed sheath material

it is necessary to add a certain amount of flame retardant so to meet the flame retardant requirement. For studying the effect of flame retardants on thermal and oxidative aging properties of epoxy resin materials

three kinds of different epoxy resin samples are made

and their appearance

mass loss rate

tensile strength

dielectric performance

FTIR and thermal weight loss are tested before and after aging. It is found by the study that after thermal and oxidative aging

the tensile strength and dielectric constant of epoxy resin materials decrease

the dielectric loss increases

and the addition of flame retardant will further reduce the thermal stability

mechanical properties and dielectric properties of epoxy resin materials. Therefore

under the condition of satisfying the flame retardant performance of epoxy resin

the usage amount of flame retardant should be reduced as much as possible.