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Formula and prepn process of low-density foamed poly-4-methyl-1-pentene

A foam material and low-density technology, applied in the field of low-density foam material preparation, can solve the problems of destroying foam structure, collapse, and micropore collapse, and achieve the effects of precise control, simple operation, and easy processing and molding

Inactive Publication Date: 2004-02-11
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The poly-4-methyl-1-pentene (PMP) low-density foam material prepared in the prior art easily causes inhomogeneous or collapsed foam material skeleton network structure, and the block solid surface is a porous foam structure, and the center still has When the solid solvent exists or the solvent comes out, it is easy to cause the micropores to collapse and destroy the foam structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Heat 60g of durene and 140g of refined naphthalene to 180-200°C to melt, add 1g of poly-4-methyl-1-pentene and a small amount of antioxidant, continue heating and stirring until poly-4-methyl-1- The pentene is completely dissolved, and the solution is uniform and transparent. Transfer the solution to the preheated mold, then place the mold in the axial cooling and gelation treatment system, set the temperature control program, keep the temperature at 180-200°C for 2 hours, and then cool down in the axial direction to control the cooling rate ≤5°C / min. After the mixed solvent is completely solidified, process it into the desired shape with a lathe together with the mold, replace it with isopropanol for 7 days, and dry it by supercritical CO2 extraction to obtain poly-4-methyl-1-pentene with a density of about 5 mg / cm3 Foam products, foam pore diameter: 1 ~ 20μm.

Embodiment 2

[0053] System components:

[0054] Durene: 39.2g

[0055] Refined naphthalene: 40.8g

[0056] Poly-4-methyl-1-pentene (PMP): 4.3g

[0057] The above components were operated according to the process described in Example 1, and replaced with methanol solvent for 10 days. The prepared PMP foam material had a density of about 55 mg / cm3 and a foam pore diameter of 1-20 μm.

Embodiment 3

[0059] System components:

[0060] Durene: 70g

[0061] Refined naphthalene: 30g

[0062] Poly-4-methyl-1-pentene (PMP): 8g

[0063] The above components were operated according to the process described in Example 1, and replaced with ethanol solvent for 12 days. The density of the prepared PMP foam material was about 80 mg / cm3, and the diameter of the foam cells was 1-20 μm.

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PUM

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Abstract

The invention provides a formula of low-density foaming material of poly-tetramethyl-propyl ethylene and the method of preparation. Adopting the invention's preparing method to prepare the low-density foam of poly-tetramethyl-propyl ethylene (PMP) needs mixing the purified solvent-non-solvent system and the polymer of poly-tetramethyl-propyl ethylene (PMP) according to appropriate preparing proportion, then heat the mixture to dissolve, the move the heated mixture to the mould, place the mould in the processing system of axial cooling and gelating, then by adopting the adapt rate of cooling and temperature lowering, condense the heated mixture to obtain the solid mixture; and the solid mixture is manufactured into the required shape by the lathe or other machineries, and after it is replaced by the solvent and extracted by CO2 beyond critical.

Description

1. Technical field [0001] The invention belongs to the field of low-density foam material preparation, and in particular relates to a poly-4-methyl-1-pentene (PMP) low-density foam material formula and a preparation method. 2. Background technology [0002] Poly-4-methyl-1-pentene (PMP) foam material has become the most widely used in inertial confinement fusion (ICF) experimental research in the world due to its high strength, easy molding and pure hydrocarbon material. One of the low density porous materials. [0003] The poly-4-methyl-1-pentene (PMP) low-density foam material prepared in the prior art easily causes inhomogeneous or collapsed foam material skeleton network structure, and the block solid surface is a porous foam structure, and the center still has When the solid solvent exists or the solvent comes out, it is easy to cause the collapse of the micropores and destroy the foam structure. 3. Contents of the invention [0004] The purpose of the present inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/00C08L23/18
Inventor 张林王朝阳罗炫杜凯
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS