"Properties of lightweight, ablation and thermal insulation materials

Abstract

Methyl vinyl silicone rubber and methyl vinyl phenyl silicone rubber were used as the matrix, silica and boron phenolic resin (BF) were added for mixing, a light ablative heat insulation material was prepared. The density of the heat insulation material, the ablative performance of the heat insulation material under oxygen-acetylene flame and the back temperature of the material in the ablative process were studied. The results showed that with the addition of BF, the density of thermal insulation materials decreased significantly. When the amount of BF was 40 phr and 50 phr (mass, the same below), the density was 0.816 7 g/cm3 and 0.752 8 g/cm3 respectively, which was 29.35% and 34.88% lower than that without BF. With the increasing amount of BF, the mass ablation rate and linear ablation rate of the thermal insulation material increased, but the addition of BF could enhance the thermal insulation performance of the material. When 40 phr BF were added, the maximum back temperature was only 78 ℃.

Keywords

• hot vulcanized silicone rubber
• boron phenolic resin
• light weight
• ablation