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Conductive polymer material and preparation method thereof

A conductive polymer, conductive carbon black technology, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc. Product is light, good mechanical properties, good effect of PTC effect

Inactive Publication Date: 2015-11-04
广东鲁华新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When preparing conductive polymer materials, it is usually achieved by adding conductive carbon black to the substrate, so that the mechanical properties of conductive polymer materials will be greatly reduced due to the addition of a large amount of conductive carbon black.
Moreover, many polymer substitute materials can only show a good PTC effect at a relatively high voltage, so it is easy to cause safety problems during the use of heater elements

Method used

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  • Conductive polymer material and preparation method thereof
  • Conductive polymer material and preparation method thereof
  • Conductive polymer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The conductive polymer material comprises the following components by weight percentage:

[0020]

[0021]

[0022] The conductive polymer material is prepared by tableting method at normal temperature, and the specific steps are as follows: add the ethylene-vinyl acetate, polyethylene, and ethylene-methyl acrylate copolymer in the above-mentioned formula amount into a low-mixer and mix well, and the low-mixer The rotation speed is 30-50rpm / min, stirring for 5-15min; continue to add the above formula amount of carbon nanotubes, conductive carbon black, titanate coupling agent and antioxidant into the low mixer, stir for 5-8min, and The above materials are fully mixed; the mixed materials are extruded and granulated by a twin-screw extruder, the speed of the twin-screw extruder is 80-200rpm / min, and the extrusion temperature is 180-200°C; The pellets are dried at a temperature of 70-80°C for 1-2 hours, and a conductive polymer material is obtained after drying.

...

Embodiment 2

[0025] The conductive polymer material according to Example 1 also includes the following components in weight percent:

[0026] Fragrance 0.1~1.0%

[0027] Under the condition of normal temperature, the conductive polymer material is prepared by tableting method, and the specific steps are as follows: add the ethylene-vinyl acetate, polyethylene, ethylene-methyl acrylate copolymer and aromatic agent in the formula amount into the low mixer and mix evenly. The speed of the mixer is 30-50rpm / min, stirring for 5-15 minutes; continue to add the formula amount of carbon nanotubes, conductive carbon black, titanate coupling agent and antioxidant into the low-speed mixer, and stir for 5-8 minutes. Fully mix the above materials; extrude the mixed materials into pellets through a twin-screw extruder, the speed of the twin-screw extruder is 80-200rpm / min, and the extrusion temperature is 180-200°C; The molded pellets are dried at a temperature of 70-80° C. for 1-2 hours, and a conduct...

Embodiment 3

[0030] The conductive polymer material comprises the following components by weight percentage:

[0031]

[0032] When preparing 1000g of conductive polymer material, add 316g of ethylene-vinyl acetate, 300g of polyethylene and 100g of ethylene-methyl acrylate copolymer into the low mixer at a speed of 50rpm / min, and stir for 10min; in the low mixer Continue to add 8g of carbon nanotubes, 200g of conductive carbon black, 2g of titanate coupling agent and 2g of antioxidant, continue to stir for 8 minutes, and fully stir and mix the above materials; extrude the mixed materials through a twin-screw extruder For granulation, the speed of the twin-screw extruder is 100rpm / min, and the extrusion temperature is 200°C; after extrusion, the molded pellets are dried at a temperature of 80°C for 1 to 2 hours, and the conductive polymer is obtained after drying. Material.

[0033] The tensile strength of the conductive polymer material is 12MPa, the elongation at break is 953%, the fl...

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Abstract

The invention discloses a conductive polymer material and a preparation method thereof. The conductive polymer material comprises 25.0-35.0wt% of ethylene-vinyl acetate, 3.0-10.0wt% of carbon nanotube, 25.0-40.0wt% of polyethylene, 5.0-15.0wt% of ethylene-methyl acrylate copolymer, 0.1-1.0wt% of a titanate coupling agent, 15.0-20.0wt% of conductive carbon black and 0.1-1.0wt% of an antioxidant. The conductive polymer material is prepared through a tabletting technology, the preparation method is simple, and the prepared conductive polymer material has very good mechanical performances and conductivity, has a very good PTC effect under a low voltage, can substitute electric heating components, has the characteristics of safety, energy saving, workability, low cost, and portable, movable and foldable product, and can be widely used in the industries of floor heating, wall heating and movable heating.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a conductive polymer material and a preparation method. Background technique [0002] Conductive polymer materials have a good positive temperature coefficient effect (PTC effect), the resistance of the material will increase with the increase of temperature, and are usually used to replace metals to make electric heating components. When preparing conductive polymer materials, it is usually achieved by adding conductive carbon black to the substrate, so that the mechanical properties of conductive polymer materials will be greatly reduced due to the addition of a large amount of conductive carbon black. Moreover, many polymer substitute materials can only exhibit a good PTC effect at a relatively high voltage, so it is easy to cause safety problems during the use of the heater element. Contents of the invention [0003] The object of the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K7/24C08K3/04C08K5/10
CPCC08K2201/003C08L23/0853C08L2205/02C08L2205/03C08L23/06C08L23/0869C08K7/24C08K5/10C08K3/04Y02P20/10
Inventor 王柏耀
Owner 广东鲁华新材料科技股份有限公司
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