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Anion in situ preparation method of polysulfone analog/MC nylon6 composite material

A technology of casting nylon and composite materials, which is applied in the field of material science and can solve the problems of difficulty in meeting the high-performance requirements of large parts, poor dimensional stability and thermal stability, etc.

Inactive Publication Date: 2009-07-22
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the further expansion of the application range of cast nylon, higher and higher requirements are put forward for its performance, especially its poor dimensional stability and thermal stability, etc., it is difficult to meet the high performance requirements of large parts

Method used

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Examples

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Effect test

Embodiment Construction

[0010] The following examples are to further illustrate the present invention, but not to limit the scope of the present invention.

[0011] The anion in-situ preparation method of the polysulfone / cast nylon 6 composite material of the present invention is realized through the following steps:

[0012] In the first step, 100 parts by weight of caprolactam is placed in a reaction vessel and heated to 110° C., vacuum dehydrated for 30 minutes, and the vacuum is 10 -1 -10 -3 Pa, add 0.35 parts by weight of sodium hydroxide as a catalyst, and continue vacuum dehydration for 30 minutes.

[0013] The second step is to open the valve, remove the vacuum, add 5 parts by weight of phthalein pendant polyarylether sulfone, raise the temperature to 150° C., and stir magnetically to fully dissolve the phthalein pendant polyarylether sulfone in the caprolactam melt until uniformly dispersed. Vacuum dehydration for 30min, vacuum degree is 10 -1 -10 -3 Pa.

[0014] The third step is to re...

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PUM

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Abstract

The invention discloses an anion in-situ preparation method of a polysulfone / cast nylon 6 composite material. The raw materials include caprolactam, polysulfones, catalysts, activators, etc., first heat and melt the caprolactam monomer, vacuum dehydrate, add catalyst, continue vacuum dehydration, then add polysulfone resin, magnetic stirring, make polysulfone in the caprolactam melt Fully dissolve in the mixture until it is evenly dispersed, add the activator, mix quickly and evenly, cast it into a preheated mold, and demould, and the polysulfone / cast nylon 6 composite material is obtained. The in-situ composite material prepared by the method of the present invention has certain improvements in tensile strength, tensile elastic modulus, flexural strength, and flexural elastic modulus, especially heat resistance, which is significantly improved compared with pure cast nylon. Improvement, increased by nearly 80°C.

Description

technical field [0001] The invention relates to the preparation of in-situ polysulfone / cast nylon 6 composite materials by adopting an anion polymerization method, and belongs to the field of material science and technology. Background technique [0002] Cast nylon 6 (MC nylon 6) is a kind of nylon material. Its preparation method is to dehydrate the molten caprolactam under normal pressure under reduced pressure, and add a strong alkaline substance as a catalyst for further dehydration, and then mix with an activator (such as Isocyanate) and other additives are mixed together and directly injected into the preheated mold at a certain temperature. The material undergoes rapid polymerization reaction in the mold and solidifies into a solid billet. Cast nylon has the advantages of low polymerization temperature, simple process, high crystallinity, large molecular weight, higher mechanical properties than ordinary nylon, wear resistance, self-lubrication, shock absorption and n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/06C08L77/02
Inventor 林志勇钱浩陈婉吟黄丽丹黄锦河陈瑜姚辉梅
Owner HUAQIAO UNIVERSITY