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PP/PA6 porous composite material and preparation method thereof

A technology of porous composite materials and polymers, applied in the field of foamed plastics, can solve the problems of poor cell nucleation effect and poor performance of foamed materials, and achieves improved interface bonding, high surface energy, and improved interface compatibility. Effect

Active Publication Date: 2022-03-01
LIMING VOCATIONAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of PP / PA6 porous composite material, which solves the problem of poor nucleation effect of cells in the existing foaming process, resulting in poor performance of foamed materials

Method used

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  • PP/PA6 porous composite material and preparation method thereof
  • PP/PA6 porous composite material and preparation method thereof
  • PP/PA6 porous composite material and preparation method thereof

Examples

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preparation example Construction

[0044] A preparation method of PP / PA6 porous composite material, comprising the following steps:

[0045] Step 1, first dry PP, PA6 and nano-nucleating agent, and stand-by, the nano-nucleating agent is nano-silica or nano-calcium carbonate;

[0046] Step 2, then modify the AF fiber:

[0047] Degreasing operation: Soak the AF fibers in the sodium dodecylbenzenesulfonate aqueous solution and sonicate for 0.5-1 hour, and filter the obtained mixture through a nanofiltration membrane, wash it with water for 3-5 times, and dry it for use;

[0048] The Friedel-Crafts reaction operation is: soak the degreased AF fiber in epichlorohydrin, vacuumize, fill with nitrogen, repeat several times, keep an inert atmosphere, and keep the reaction system at 110-130°C for 0.5-1h to condense and reflux. Add AlCl to the system several times 3 , and reacted for 8-10 hours to obtain the modified AF crude product;

[0049] Purification operation: Then the modified AF crude product is washed with et...

Embodiment 1

[0081] A kind of preparation method of PP / PA6 porous composite material, such as figure 2 shown, including the following steps:

[0082] Step 1. First vacuum-dry nano-silica and PP at 80°C for 4 hours, and vacuum-dry PA6 at 100°C for 4 hours;

[0083] Step 2, then modify the AF fiber:

[0084] The degreasing operation is as follows: immerse 25g of AF fibers in 150mL of sodium dodecylbenzenesulfonate aqueous solution with a mass concentration of 1% and sonicate for 0.5h at an ultrasonic frequency of 80MHz. After the obtained mixture is filtered through a nanofiltration membrane, Wash 5 times with water, dry at 80°C for 2 hours, and set aside;

[0085] The Friedel-Crafts reaction operation is as follows: soak the degreased AF fiber in 50mL of epichlorohydrin, vacuumize, fill with nitrogen, repeat three times, keep an inert atmosphere, keep the reaction system at 120°C for 0.5h, and pour into the system Add AlCl five times 3 , reacted for 8h, obtained modified AF crude produ...

Embodiment 2

[0094] The difference from Example 1 is that in this example:

[0095] Step 4. According to the formula ratio, 70g PP, 40g PA6, 6g ADR-4368, 3g PP-g-MAH, 20g modified AF fiber, 0.4g polyisobutyl methacrylate and 8g modified nano silicon dioxide were mixed in Stir under the rotating speed of 250r / min into powder, obtain premixed resin;

[0096] Refer to the preparation method of Example 1 for other steps.

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Abstract

The invention discloses a PP / PA6 porous composite material, which is prepared from the following raw materials in parts by weight: 50 to 70 parts of PP, 30 to 50 parts of PA6 resin, 5 to 8 parts of epoxy chain extender, 3 to 7 parts of compatilizer, 20 to 35 parts of modified AF fiber, 0.4 to 0.6 part of foam stabilizer and 3 to 15 parts of modified nano nucleating agent. The invention also discloses a preparation method of the PP / PA6 porous composite material, the PP / PA6 composite material is sequentially subjected to melting, extrusion granulation and gas-assisted mold opening and closing microcellular foaming injection molding processes to obtain the composite material, and the prepared PP / PA6 porous composite material has the advantages of good melting formability, high foaming ratio, high percentage of close area and uniform and moderate size; the tensile strength is high, and the comprehensive mechanical property is good; the density is small, the characteristic of light weight is realized, and the use performance is good.

Description

technical field [0001] The invention relates to the technical field of foamed plastics, in particular to a PP / PA6 porous composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) has excellent overall performance, but its melt strength is poor during processing and the foaming temperature range is narrow, which limits the application of PP in the field of injection micro-foaming; Nylon 6 (PA6) has excellent molding performance , but its high water absorption leads to poor dimensional stability and mechanical properties of the product. The composite material prepared by blending PP and PA6 is complementary in performance, can exert the excellent performance of the material, achieve the purpose of toughening PP, improve its wear resistance and impact resistance, and reduce the water absorption and material cost of PA6 at the same time . [0003] Microcellular foaming requires the size of the pore structure to be controlled at the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L23/14C08L77/02C08L77/10C08L51/06C08K9/06C08K3/36C08K3/26C08J9/12C08J9/00
CPCC08J9/122C08J9/0061C08J2353/00C08J2323/14C08J2377/02C08J2477/10C08J2451/06C08J2203/06C08J2203/08C08K9/06C08K3/36C08K2003/265
Inventor 肖晖黄伟王经逸林鸿裕詹迎旭吕明旭刘东斌徐炜斌
Owner LIMING VOCATIONAL UNIV
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