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Polymer-based conductive elastomer and preparation method thereof

A technology of polymers and elastomers, applied in the field of designing conductive polymer composite materials, to achieve the effects of improved tensile strength, good elasticity and resilience, and improved elasticity and resilience.

Active Publication Date: 2015-03-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of such isolated structures with excellent interfacial interactions has not been reported so far

Method used

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  • Polymer-based conductive elastomer and preparation method thereof
  • Polymer-based conductive elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The vulcanizing agent is 3phr dicumyl peroxide (DCP), blended with ethylene octene copolymer (POE) for 1min, statically vulcanized at 170°C and 10MPa for 15min, and cooled for 1min. After being pulverized by a high-speed pulverizer with a rotating speed of 25,000 rpm for 3 minutes, cross-linked particles with a particle size of 40-60 mesh (about 250-420 microns) were screened out with a sample sieve.

[0033] Under the conditions of 150°C and 50rpm, the POE and mass fraction were respectively 0, 2.5, 5, 7.5, 10, 12.5, 15, 17.5 in a torque rheometer (XSS-300, produced by Shanghai Qingji Mold Factory). The multi-walled carbon nanotubes (MWCNT) blended for 5 minutes to obtain a masterbatch; then the above-mentioned cross-linked particles with a content of 75wt.% were added, and the blending was continued for 5 minutes. After blending, hot press at 150°C and 10 MPa for 5 minutes, and cool to prepare the crosslinked particle / POE / MWCNT-A conductive elastomer.

Embodiment 2

[0035] The vulcanizing agent is 3phr dicumyl peroxide (DCP), blended with ethylene octene copolymer (POE) for 1min, statically vulcanized at 170°C and 10MPa for 15min, and cooled for 1min. After being pulverized by a high-speed pulverizer with a rotating speed of 25,000 rpm for 3 minutes, cross-linked particles with a particle size of 40-60 mesh (about 250-420 microns) were screened out with a sample sieve.

[0036] Under the conditions of 150°C and 50rpm, the POE and mass fraction were respectively 0, 2.5, 5, 7.5, 10, 12.5, 15, 17.5 in a torque rheometer (XSS-300, produced by Shanghai Qingji Mold Factory). The multi-walled carbon nanotubes (MWCNT) blended for 5 minutes to obtain a masterbatch; then the above-mentioned cross-linked particles with a content of 25 wt.% were added, and the blending was continued for 5 minutes. After blending, hot press at 150°C and 10 MPa for 5 minutes, and cool to obtain a crosslinked particle / POE / MWCNT-B conductive elastomer.

Embodiment 3

[0038] The vulcanizing agent is 3phr dicumyl peroxide (DCP), blended with ethylene octene copolymer (POE) for 1min, statically vulcanized at 170°C and 10MPa for 15min, and cooled for 1min. After being pulverized by a high-speed pulverizer with a rotating speed of 25,000 rpm for 3 minutes, cross-linked particles with a particle size of 20-40 mesh (about 420-850 microns) were screened out with a sampling sieve.

[0039] Under the conditions of 150°C and 50rpm, the POE and mass fraction were respectively 0, 2.5, 5, 7.5, 10, 12.5, 15, 17.5 in a torque rheometer (XSS-300, produced by Shanghai Qingji Mold Factory). The multi-walled carbon nanotubes (MWCNT) blended for 5 minutes to obtain a masterbatch; then the above-mentioned cross-linked particles with a content of 75wt.% were added, and the blending was continued for 5 minutes. After blending, heat-press at 150°C and 10 MPa for 5 minutes, and cool to obtain a cross-linked particle / POE / MWCNT-C conductive elastomer.

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Abstract

The invention discloses a polymer-based conductive elastomer and its preparation method. According to the preparation method, a certain percentage of a cross-linking agent is used to crosslink a polymer matrix and the cross-linked polymer matrix is crushed to obtain cross-linked particles; and the cross-linked particles are added in proportion into the matrix to prepare a cross-linked particles / elastic matrix / conductive carbon material composite elastomer. By the above method, conductive percolation threshold of the polymer-based conductive elastomer can effectively be reduced; stretching strength of the polymer-based conductive elastomer under the stretching action can be enhanced; and elasticity of the polymer-based conductive elastomer can effectively be raised, and strain recovery rate of the polymer-based conductive elastomer under strain retraction action can be raised. The polymer-based conductive elastomer prepared by the above method has advantages of good electrical property, enhanced stretching strength and good and stable elasticity and rebound resilience. The method provided by the invention has advantages of simple preparation technology, low cost, short production period and the like during the construction process.

Description

technical field [0001] The invention relates to a new field of designing conductive polymer composite materials, in particular to a new method for introducing cross-linked particles into a polymer-based conductive elastomer to construct an isolation structure with excellent interfacial interaction. Background technique [0002] Conductive polymer composites with isolated structures consist of a polymer matrix, well-dispersed isolated structures, and conductive fillers. The introduction of isolation structures in conductive polymer composites can greatly reduce the percolation value of conductive polymer composites. Therefore, in recent decades, conductive polymer composites with isolation structures have attracted more and more attention. Typically, such isolation structures are constructed using polymers with higher viscosity, such as ultra-high molecular weight polyethylene (UHMWPE), natural rubber (NR), and the like. Many scholars have studied the properties of composite...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/16C08L61/06C08L9/02C08K5/14C08K7/24C08K3/04C08J3/22
CPCC08J3/226C08J2307/00C08J2323/08C08J2323/16C08J2407/00C08J2423/08C08J2423/16C08L7/00C08L23/0815C08L23/16C08L2203/20C08L2205/03C08K5/14C08K7/24C08L61/06C08K3/04
Inventor 杨伟李亭马丽凤亓国强包睿莹谢邦互杨鸣波
Owner SICHUAN UNIV
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