Heat conducting composite material of polyethylene in high density, rpeparation method and application thereof
A technology of high-density polyethylene and heat-conducting composite materials, applied in heat exchange materials, circuit substrate materials, chemical instruments and methods, etc., can solve problems such as poor compatibility and decreased mechanical properties of the blend system, and achieve low cost, Excellent comprehensive performance and improved impact strength
Inactive Publication Date: 2007-07-11
SICHUAN UNIV
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Problems solved by technology
Due to the poor compatibility between polyolefins and inorganic fillers, after adding thermally conductive fillers, although the thermal conductivity of the composite material increases, it also causes a decrease in the mechanical properties of the blend system, thus improving the compatibility between polyolefins and inorganic fillers. Capacitance is the key to improving the mechanical properties of the blend system
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0023] 1. Use JJ-2 electrostatic accelerator to irradiate high-density polyethylene in the air at room temperature, with an irradiation dose of 30kGy. Add 15 grams of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane to 1000 grams of silica, mix with a high-speed mixer for 30 minutes, and then dry. 75 grams of high-density polyethylene, 25 grams of irradiated high-density polyethylene (30kGy), and 100 grams of silica were mixed with a two-roll mill at a mixing temperature of 165°C and a mixing time of 8 minutes to obtain high-density polyethylene. Density polyethylene thermally conductive composite material.
[0024] 2. Using cylindrical Co 60 The gamma-ray source irradiates high-density polyethylene in the air at room temperature, and the irradiation dose is 40kGy. Add 20 grams of γ-aminopropyltriethoxysilane to 1000 grams of aluminum oxide, mix with a high-speed mixer for 40 minutes, and then dry. 80 grams of high-density polyethylene, 20 grams of irradiated high-density polyethyle...
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The present invention discloses a high-density polyethylene heat transfer composite material, its preparation and application. It is characterized by that it adopts gamma-ray or electronic beam to irradiate high-density polyethylene, and on its molecular chain the oxygen-contained polar group can be introduced. Said invention utilizes 100-5 weight portions of irradiated high-density polyethylene, 0-95 weight portions of high-density polyethylene and 40-400 weight portion of heat transfer inorganic filler treated by coupling agent (whose centent is 0.5-2.5% of inorganic filler content), and mixes them to make them produce hydrogen bonding and chemical reaction so as to obtain the invented material. Said invention also provides its application range.
Description
1. Technical Field [0001] The invention relates to a high-density polyethylene thermally conductive composite material and a preparation method and application thereof, and belongs to the field of polymer material processing. 2. Background technology [0002] Traditional thermal conductive materials are mostly metals (such as iron, copper, aluminum) and metal oxides (such as aluminum oxide, magnesium oxide) and other non-metallic materials (such as graphite, carbon black, boron nitride, aluminum nitride). Ordinary polymer materials, such as polyolefin, polycarbonate, polyester, polyamide, etc., have poor thermal conductivity and are poor thermal conductors, and their application in applications requiring heat transfer and heat dissipation is greatly restricted. In order to improve the thermal conductivity of polymer materials, metal or inorganic thermally conductive fillers with high thermal conductivity are usually blended with polymer materials. The thermal conductivity of the ...
Claims
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IPC IPC(8): C08L23/06C09K5/14H05K1/03H01B3/44
Inventor 刘鹏波刘道龙范萍徐闻徐僖
Owner SICHUAN UNIV