High-elasticity anti-shock polyimide foamed material and preparation method thereof

Abstract

The invention discloses a high-elasticity anti-shock polyimide foamed material and a preparation method thereof. The material is prepared from, by weight, 60-80 parts of benzophenone tetracarboxylic dianhydride, 60-70 parts of methyl alcohol, 40-50 parts of malondialdehyde, 12-14 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 6-8 parts of triethylamine, 7-9 parts of n-pentane, 3-4 parts of dibasic lead stearate, 8-10 parts of 4,5-cyclohexene oxide-1,2-diformic diglycidyl ester, 5-7 parts of didodecyl carbon alcohol ester, 6-9 parts of phenyl triethoxy silane, 4-6 parts of epoxidized soybean oil, 4-5 parts of dibromoneopentyl glycol, 20-25 parts of ceramsite sand, 10-12 parts of tomentum powder, 5-7 parts of hollow silicon dioxide nanospheres, 4-5 parts of pyrolysis waste rubber powder, 4-6 parts of expanded graphite, 3-5 parts of hydrotalcite, 5-8 parts of jute fibers and 2-4 parts of molybdenum disulfide. The added 4,5-cyclohexene oxide-1,2-diformic diglycidyl ester has high rebound resilience, torsion stress and toughness, and foam has good shock resistance and buffer performance after the 4,5-cyclohexene oxide-1,2-diformic diglycidyl ester is combined with the added hollow silicon dioxide nanospheres, tomentum powder and the like; the added expanded graphite and hydrotalcite are compounded in use, so that the flame retardant property of the material is enhanced.

Description

technical field [0001] The invention relates to a foam material, in particular to a high-elastic shock-resistant polyimide foam material and a preparation method thereof. Background technique [0002] Polyimide is a kind of heat-resistant polymer material with excellent comprehensive performance. It not only has high thermal performance, mechanical performance and chemical stability, but also has low dielectric constant and thermal expansion coefficient. Polyimide foam not only has the characteristics of light weight and low density, but also has incomparable heat resistance, flame retardancy and dimensional stability of polyurethane foam, polyethylene foam and polystyrene foam. It has attracted great attention from the aerospace industry and has been used as heat and sound insulation materials for various aircraft. However, polyimide foam materials have high production costs, poor resilience, and low shock resistance, which limit the use of polyimide foam materials. Applic...

AI Technical Summary

Problems solved by technology

Polyimide foam not only has the characteristics of light weight and low density, but also has incomparable heat resistance, flame retardancy and dimensional stability of polyurethane foam, polyethylene foam and polystyrene foam. It has attracted great attention from the aerospace industry and has been used as heat and sound insulation materials for various aircraft. However, polyimide foam materials have high production costs, poor resilience, and low shock resistance, which limit the use of polyimide foam materials. Applications