Low electric conductivity high heat radiation polymeric composition and molded body

Abstract

The present invention provides a low electric conductivity, high heat radiation polymeric composition which includes a polymeric material and a carbon-based filler compounded with the polymeric material, wherein the carbon-based filler has an electron withdrawing agent grafted onto a surface of the carbon-based filler.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view illustrating an electron withdrawing agent-grafted carbon-based filler, and a polymeric composition compounded with the electron withdrawing agent-grafted carbon-based filler, according to the present invention;

FIG. 2 is a perspective view showing an example of a molded body molded using the polymeric composition of the present invention.

FIG. 3 is a view illustrating a device and a method for orienting carbon fibers using a magnetic field;

FIG. 4 is a view also illustrating the method for orienting carbon fibers using the magnetic field;

FIG. 5 is a graph showing the measurement results of the azimuth intensity distribution using an X-ray diffraction analysis;

FIG. 6 is a microphotograph of an example of a molded body in which carbon fibers were not oriented; and

FIG. 7 is a microphotograph of an example of a molded body in which carbon fibers were oriented.

Claims

1. A low electric conductivity, high heat radiation polymeric composition comprising: a polymeric material; anda carbon-based filler compounded with the polymeric material,wherein the carbon-based filler has an electron withdrawing agent grafted onto a surface of the carbon-based filler.

2. The low electric conductivity, high heat radiation polymeric composition according to claim 1, wherein a graft ratio of the electron withdrawing agent is 0.5% by weight or more.

3. The low electric conductivity, high heat radiation polymeric composition according to claim 2, wherein the carbon-based filler is carbon black, and the graft ratio of the electron withdrawing agent is 20% by weight or more.

4. The low electric conductivity, high heat radiation polymeric composition according to claim 2, wherein the carbon-based filler is PAN-based carbon fiber, and the graft ratio of the electron withdrawing agent is 10% by weight or more.

5. The low electric conductivity, high heat radiation polymeric composition according to claim 2, wherein the carbon-based filler is pitch-based carbon fiber.

6. The low electric conductivity, high heat radiation polymeric composition according to claim 1, wherein an amount of the carbon-based filler compounded with the polymeric material is from 10 to 80% by volume.

7. A low electric conductivity, high heat radiation molded body using the low electric conductivity, high heat radiation polymeric composition according to claim 1.

8. The low electric conductivity, high heat radiation molded body according to claim 7, wherein the carbon-based filler is oriented within the polymeric material.

9. A method of manufacturing a low electric conductivity, high heat radiation molded body, comprising: molding at least one of a molded body and a molded body serving as a material of the molded body by using the low electric conductivity, high heat radiation polymeric composition according to claim 1; andorienting a carbon-based filler in a polymeric material of the molded body by using a magnetic field when the polymeric material is in a molten state.