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Preparation method of polypropylene (PP)/nickel-coated glass fiber (NCGF) composite material

A glass fiber and composite material technology, which is applied in the field of preparation of conductive polymer composite materials, can solve the problems of reducing the conductive percolation value of composite materials, restricting applications, and reducing the mechanical properties of materials, and achieves improved crystallinity, efficient construction, and strength. improved effect

Active Publication Date: 2015-09-09
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above methods often reduce the mechanical properties of the material while reducing the conductive percolation value of the composite material, thus limiting its application in the engineering field.

Method used

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  • Preparation method of polypropylene (PP)/nickel-coated glass fiber (NCGF) composite material
  • Preparation method of polypropylene (PP)/nickel-coated glass fiber (NCGF) composite material
  • Preparation method of polypropylene (PP)/nickel-coated glass fiber (NCGF) composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raise the temperature of the torque rheometer to 200 °C, add 30 g of homopolypropylene to it, and banbury for 5 minutes at a speed of 60 rpm to fully melt the homopolypropylene;

[0024] Add 0.06 g of sorbitol-based nucleating agent DBS to the torque rheometer, the quality of sorbitol-based nucleating agent DBS is 0.2% of the homopolymer polypropylene mass, and knead for 5 min to make the two evenly mixed;

[0025] Add nickel-plated glass fiber wherein again, make the volume ratio of polypropylene and nickel-plated glass fiber be 91.64:8.36, knead for 8 min, obtain the evenly dispersed mixture;

[0026] The mixture was hot-pressed at 190 °C and 10 MPa to obtain a polypropylene / nickel-plated glass fiber composite material with high electrical conductivity and strength.

Embodiment 2

[0028] Raise the temperature of the torque rheometer to 200 °C, add 50 g of homopolypropylene to it, and banbury for 6 min at a speed of 60 rpm to fully melt the homopolypropylene;

[0029] Add 0.1 g of sorbitol-based nucleating agent DBS to the torque rheometer, the quality of sorbitol-based nucleating agent DBS is 0.2% of the mass of homopolypropylene, and knead for 8 min to make the two evenly mixed;

[0030] Add nickel-plated glass fiber wherein again, make the volume ratio of polypropylene and nickel-plated glass fiber be 89.16:10.84, knead for 10 min, obtain the evenly dispersed mixture;

[0031] The mixture was hot-pressed at 190 °C and 15 MPa to obtain a polypropylene / nickel-plated glass fiber composite material with high electrical conductivity and strength.

Embodiment 3

[0033] Raise the temperature of the torque rheometer to 200 °C, add 40 g of homopolypropylene to it, and banbury for 7 minutes at a speed of 60 rpm to fully melt the homopolypropylene;

[0034] Add 0.08 g of sorbitol-based nucleating agent DBS to the torque rheometer, the quality of sorbitol-based nucleating agent DBS is 0.2% of the homopolymer polypropylene mass, and knead for 5 min to make the two evenly mixed;

[0035] Add nickel-plated glass fiber to it again, make the volume ratio of polypropylene and nickel-plated glass fiber be 87.77:12.23, knead for 10 min, obtain the evenly dispersed mixture;

[0036] The resulting mixture was hot-pressed at 190 °C and 12 MPa to obtain a polypropylene / nickel-plated glass fiber composite material with high electrical conductivity and strength.

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Abstract

The invention relates to a preparation method capable of enhancing electric conductivity and mechanical properties of a polypropylene (PP) / nickel-coated glass fiber (NCGF) composite material. According to the method, PP, a nucleator and NCGF are processed by melt blending to obtain the PP / NCGF composite material with favorable electric conductivity and mechanical properties. The nucleator is added to enhance the crystallinity of the PP and increase the crystalline region occupied volume. Under the volume elimination effect of the crystalline region, the electric conduction glass fibers are uniformly distributed in the amorphous region to enhance the effective concentration of the amorphous region and promote the formation of the electric conduction network, thereby obviously enhancing the electric conductivity of the composite material. The added nucleator enhances the crystallinity of the PP, enables the crystal grain to be uniform and refined, and is beneficial to the enhancement of the strength of the composite material. The method is simple in operational process and can easily implement industrial production. The prepared composite material has favorable electric conductivity and stability, and can be used in the fields of electromagnetic shielding, electronic and electric appliances, static resistance and the like.

Description

technical field [0001] The invention relates to a method for preparing a conductive polymer composite material, in particular to a method for preparing a polypropylene / nickel-plated glass fiber composite material with high electrical conductivity and strength. Background technique [0002] Conductive polymer composite materials usually refer to composite materials with certain conductive functions prepared by compounding polymer materials as matrix and conductive substances as fillers in a certain proportion. This type of composite material has gradually become a hot spot in the research field of conductive polymer materials due to its advantages such as good processability, wide adjustable range of resistance, low cost, and strong designability. After years of research and development, conductive polymer materials have gradually entered the stage of practical application. Due to better comprehensive properties, conductive polymer composite materials with different conducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/10C08J5/08C08L23/12C08K9/10C08K7/14C08K5/053B29C43/58
Inventor 杨雅琦董春雨刘亚青段宏基赵贵哲
Owner ZHONGBEI UNIV
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