Method for preparing polyetherketone foaming material by using supercritical CO2

Abstract

The invention discloses a method for preparing a polyetherketone foaming material by using supercritical CO2. The method specifically comprises: taking fluid CO2 in supercritical state as a physical foaming agent to perform physical foaming on polyetherketone, saturating a polyetherketone sheet material in an autoclave, and realizing foaming on the saturated polyetherketone sheet material in high-temperature oil bath to obtain a closed-cell foamed material with uniform cell distribution, wherein the cell size can be changed through the technological conditions. By taking polyetherketone as the raw material and using the green environment-friendly foaming method, the obtained high-temperature resistant polymer is not only guaranteed in the original excellent performances, but also substantially reduced in production cost, and is a foaming material with a wide application prospect.

Description

technical field

[0001] The invention relates to a method utilizing supercritical CO 2 The invention discloses a method for preparing a polyetherketone foaming material, belonging to the field of materials. Background technique

[0002] Polyether ketone (PPEK) is a new type of high-performance engineering plastic containing phthalazinone-biphenyl structure. It has high temperature resistance and excellent comprehensive performance. The main chain of PPEK contains all-aromatic phthalazinone biphenol, and a nitrogen atom is introduced on the basis of the imide ring to form a six-membered ring, which retains the high temperature resistance of the aromatic nitrogen heterocycle and overcomes the heat of the five-membered imide ring. The disadvantage of poor hydrolytic stability is that due to the introduction of the phthalazinone structure, it is more soluble in chlorinated hydrocarbons and various aprotic polar solvents. Because it does not contain a lactone-based structure, it...

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