Study on dielectric properties of modificated bismaleimide oligopolymer

This article describes the modified soluble bismaleimide oligopolymer, on which dielectric properties are researched. Its processing behavior is improved.The cross-linking agent-bisallyl bisphenol A(BBA) is used to modificate bismaleimide oligopolymer, and solidified in certain temperature. Some dielectric properties are made to measure, including electric breakdown strength, volume resistivity, dielectric constant, dielectric loss, and heat decomposition temperature (T_d). The result demonstrated that 5%cross-linking agent can lead to the heat decomposition temperature of the material 420~460 degC, electric breakdown strength is 150KV/mm, volume resistivity is 8times10¹⁶Omegamiddotcm