| Abstract:In order to improve the strength, high temperature resistance, toughness and barrier properties of polyimide fiber paper-based materials, the impregnating resin with high adhesion, easy curing, good flexibility and high temperature resistance was prepared. First, the epoxy resin modified by vinyl silicone resin was prepared to improve the toughness and curing property of the impregnated resin. Then polyimide resin was added to prepare the superalloy resin. The results showed that when 30% of vinyl silicone was used, the modified resin had better toughness and crosslinking degree, then 5% polyimide resin was added, 5% resin mass loss temperature was 339.2℃, and there was no significant glass transition at high temperature. The prepared resins were respectively used to impregnate paper-based material made of polyimide fiber, the results showed that the paper impregnated by vinyl silicone modified epoxy resin had good bonding strength, and the contact angle reached 148.71° due to the smooth surface, the enhancement effect of alloy resin was obvious at high temperature, the tensile index of paper reached 35.1 N·m/g at 200℃. |
