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Method for reinforcing polypropylene composite material by coupling modified short carbon fiber and pyridinium-modified montmorillonite

A technology of chopped carbon fiber and flame retardant polypropylene, which is applied in the field of modified plastics, can solve the problems of destroying the integrity and continuity of materials, limiting the application scope of polypropylene materials, and deteriorating mechanical properties of materials, so as to improve thermal stability and Effects of flame retardancy, rigidity enhancement, and storage modulus increase

Inactive Publication Date: 2018-10-16
QUANJIAO XIANGRUI PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the carbon-hydrogen structure of PP, the oxygen index is only about 2, and the burning rate is fast with molten droplets, which limits the application range of polypropylene materials. Therefore, the flame retardant research of PP has attracted more and more attention from industry and academia.
The addition of flame retardants usually destroys the integrity and continuity of materials and deteriorates the mechanical properties of materials, which in turn affects the application of flame retardant materials.

Method used

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  • Method for reinforcing polypropylene composite material by coupling modified short carbon fiber and pyridinium-modified montmorillonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for coupling modified chopped carbon fiber-pyridinium salt modified montmorillonite reinforced flame-retardant polypropylene composite material, comprising the steps of:

[0030] (1) Surface modification of chopped carbon fibers by coupling agent:

[0031] Add ethanol aqueous solution to the oxidized chopped carbon fiber, then add coupling agent solution, after mechanical stirring for 25 minutes, put it in a constant temperature water bath at 60-62°C and let it stand for 3 hours, after rotary evaporation, put it in 80-83°C for vacuum drying 4h in the case, after cooling, the chopped carbon fibers obtained by silane coupling agent treatment;

[0032] (2) Coupling agent treatment of basalt fiber surface modification:

[0033] Stir 0.1 part of silane coupling agent solution on a magnetic stirrer at 80-90 ° C to complete hydrolysis, soak 15 parts of dry basalt coarse sand in it for 1 hour, take it out and dry it naturally, then put it in a constant temperature box...

Embodiment 2

[0046] A method for coupling modified chopped carbon fiber-pyridinium salt modified montmorillonite reinforced flame-retardant polypropylene composite material, comprising the steps of:

[0047] (1) Surface modification of chopped carbon fibers by coupling agent:

[0048]Add ethanol aqueous solution to the oxidized chopped carbon fiber, then add coupling agent solution, after mechanical stirring for 25 minutes, put it in a constant temperature water bath at 60-62°C and let it stand for 3 hours, after rotary evaporation, put it in 80-83°C for vacuum drying 4h in the case, after cooling, the chopped carbon fibers obtained by silane coupling agent treatment;

[0049] (2) Coupling agent treatment of basalt fiber surface modification:

[0050] Stir 0.1 part of silane coupling agent solution on a magnetic stirrer at 80-90°C for complete hydrolysis, soak 15 parts of dry basalt coarse sand in it for 1 hour, take it out and dry it naturally, then put it in a constant temperature box a...

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Abstract

The invention discloses a method for reinforcing polypropylene composite material by coupling modified short carbon fiber and pyridinium-modified montmorillonite. The method comprises the following steps of putting a polypropylene plastic thin sheet, a thermoplastic elastomer and a compatilizer into an air blowing drying box to dry; uniformly mixing with the short carbon fiber treated by a silanecoupling agent, the surface-modified basalt fiber and a montmorillonite-reinforced flame-retardant system; melting, mixing and extruding at the setting processing temperature; cooling the extruded strip material, blow-drying and cutting into particles; putting the particle material into a constant-temperature drying box to dry; feeding into an injection molding machine to perform injection molding. The method has the advantages that by using the pyridinium-modified montmorillonite as a reinforcing material, and using the decabromodiphenyl ethane / antimony trioxide as a flame-retardant system, after the flame-retardant agent is added, the interlayer spacing of the montmorillonite in the polypropylene composite material is increased, and the dispersivity of the montmorillonite is improved; the thermal stability and flame-retardant property of the composite material are obviously improved, and the montmorillonite and the flame-retardant system can reach better flame-retardant synergistic effect in the polypropylene material.

Description

technical field [0001] The invention belongs to the technical field of modified plastics, and in particular relates to a method for coupling modified chopped carbon fiber-pyridinium salt modified montmorillonite to reinforce a flame-retardant polypropylene composite material. Background technique [0002] In recent years, the application fields of polypropylene (PP) materials have become more and more extensive, and the requirements for its performance have also become higher and higher. Fiber-reinforced polypropylene composites have attracted people's attention because of their superior properties such as high strength and high modulus, making them one of the hotspots of current research. [0003] As one of the five general-purpose plastics, polypropylene has the advantages of low density, easy processing, low hygroscopicity, good comprehensive mechanical properties, chemical corrosion resistance, and good electrical insulation performance. It is widely used in building mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/04C08L51/06C08K9/06C08K7/06C08K7/10C08K9/04C08K3/34C08K3/22
CPCC08L23/12C08L2201/02C08L2201/08C08L2205/03C08L51/04C08L51/06C08K9/06C08K7/06C08K7/10C08K9/04C08K9/12C08K3/346C08K3/2279
Inventor 刘仕明
Owner QUANJIAO XIANGRUI PLASTIC
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