Method for preparing polyetherketone foaming material by using supercritical CO2

A foaming material, polyether ketone technology, applied in the field of materials, to achieve the effect of high cell density, simple foaming process, and excellent heat resistance

Active Publication Date: 2013-12-11
大连疆宇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no related patents on the use of supercritical technology to prepare PPEK foam materials at home and abroad.

Method used

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  • Method for preparing polyetherketone foaming material by using supercritical CO2

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 14g of PPEK fine powder evenly into the mold, put it into a muffle furnace to melt and plasticize for 60 minutes, and then mold a 3mm PPEK sheet on a flat vulcanizing machine;

[0024] (2) Place the sheet obtained in step (1) in an autoclave, and pass through supercritical CO 2 Perform saturation, the saturation pressure is 20MPa, the saturation temperature is 50°C, and a saturated PPEK sheet is obtained after 60 minutes;

[0025] (3) Put the sheet obtained in step (2) into an oil bath at a temperature of 270°C and foam for 90 seconds to obtain a PPEK foam sheet.

[0026] The density of the PPEK foam sheet prepared above is 0.940g / cm 3 ,

[0027] The average cell size of the PPEK foam sheet can reach 21.6 μm, the cell size distribution is relatively uniform, and the cell density is large, reaching 5.20×10 6 Cells / cm 3 .

Embodiment 2

[0029] (1) Evenly add 12g of PPEK fine powder into the mold, put it into a muffle furnace to melt and plasticize for 60min, and then mold a 2mm PPEK sheet on a flat vulcanizing machine;

[0030] (2) Put the sheet obtained in step (1) into an autoclave, and pass through supercritical CO 2 Perform saturation, the saturation pressure is 25MPa, the saturation temperature is 50°C, and a saturated PPEK sheet is obtained after 60 minutes;

[0031] (3) Put the sheet obtained in step (2) into an oil bath at a temperature of 265°C and foam for 60 seconds to obtain a PPEK foam sheet.

[0032] The density of the PPEK foam sheet prepared above is 0.835g / cm 3 , the average cell size can reach 10.3μm, and the cell density can reach 8.12×10 7 Cells / cm 3 .

Embodiment 3

[0034] (1) Evenly add 12g of PPEK fine powder into the mold, put it into a muffle furnace to melt and plasticize for 60min, and then mold a 2mm PPEK sheet on a flat vulcanizing machine;

[0035] (2) Put the sheet obtained in step (1) into an autoclave, and pass through supercritical CO 2 Carry out saturation, the saturation pressure is 30MPa, the saturation temperature is 50°C, and the saturated PPEK sheet is obtained in 70 minutes;

[0036] (3) Put the sheet obtained in step (2) into an oil bath at a temperature of 270°C and foam for 90 seconds to obtain a PPEK foam sheet.

[0037] The density of the PPEK foam sheet prepared above is 0.801g / cm 3 , the average cell size can reach 8.5μm, and the cell density can reach 3.87×10 7 Cells / cm 3 .

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L71/10B29C43/00B29C44/00
Inventor 曲敏杰郑来久祝诗洋蹇锡高郭静赵建何玲玲
Owner 大连疆宇新材料科技有限公司
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