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Method for improving thermal conductivity of thermal conductive polymer

A heat-conducting polymer and heat-conducting technology, which is applied in the field of functional polymer materials, can solve the problems of material mechanical properties decline, no mention of heat-conducting coefficient heat-conducting plastics, etc., and achieve the effect of improving heat-conducting performance and improving heat-conducting ability

Inactive Publication Date: 2012-07-11
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, adding a high content of thermally conductive fillers tends to degrade the mechanical properties of the material
Patent CN101280108A discloses a thermally conductive plastic with high mechanical strength. In this invention, long glass fibers are added to improve the mechanical strength of the material under the condition of adding a high content of thermally conductive filler MgO, but the invention does not mention how to use it in this system Making thermally conductive plastics with higher thermal conductivity

Method used

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  • Method for improving thermal conductivity of thermal conductive polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, weigh each material according to the following weight percentages: polyphenylene sulfide 23.2wt%, magnesium oxide 65wt%, nano-alumina 0.5wt%, chopped glass fiber 10wt%, silane coupling agent 0.3wt%, montanic acid Wax 0.5wt%, antioxidant 0.5wt%.

[0030] Then add polyphenylene sulfide to the high-speed mixer, add magnesia, montanic acid wax and antioxidant to it, continue to mix evenly, and then feed it to the main feeding port of the twin-screw extruder; add glass fiber to it Into the high-speed mixer, add nano-alumina and silane coupling agent to it, continue to mix evenly, and then feed to the side feeding port of the twin-screw extruder; the raw materials of each component are melted and blended by the twin-screw extruder The granulation was carried out to prepare the thermally conductive polymer.

[0031] The test results of the thermally conductive polymer prepared in this embodiment are shown in Table 1.

Embodiment 2

[0033] First, weigh each material according to the following weight percentages: polyphenylene sulfide 22.7wt%, magnesium oxide 65wt%, nano-alumina 1wt%, chopped glass fiber 10wt%, silane coupling agent 0.3wt%, montanic acid wax 0.5wt%, antioxidant 0.5wt%.

[0034] Then, the thermally conductive polymer was prepared according to the preparation method described in Example 1.

[0035] The test results of the thermally conductive polymer prepared in this embodiment are shown in Table 1.

Embodiment 3

[0037] First, weigh each material according to the following weight percentages: polyphenylene sulfide 21.7wt%, magnesium oxide 65wt%, nano-alumina 2wt%, chopped glass fiber 10wt%, silane coupling agent 0.3wt%, montanic acid wax 0.5wt%, antioxidant 0.5wt%.

[0038] Then, the thermally conductive polymer was prepared according to the preparation method described in Example 1.

[0039] The test results of the thermally conductive polymer prepared in this embodiment are shown in Table 1.

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Abstract

The invention discloses a method for improving thermal conductivity of thermal conductive polymer. The method comprises the following steps of: adding a polymer substrate into a high speed mixer, adding a thermal conductive filler and other additives into the high speed mixer, continuously mixing uniformly, and feeding into a main feeding port of a double-screw extruder; controlling the ratio of a reinforcing component to the nanometer thermal conductive filler to be 20:1-5:1, adding the reinforcing component into the high speed mixer, adding the nanometer thermal conductive filler and a surface modifier, continuously mixing to ensure that the thermal conductive filler is adhered to the surface of the reinforcing component, uniformly mixing, and feeding into a side feeding port of the double-screw extruder; and performing melt blending on raw material components by using the double-screw extruder, extruding, performing water cooling, pelletizing, sieving, packaging and the like to obtain the thermal conductive polymer with improved thermal conductivity. The thermal conductive polymer prepared by the method has the improved thermal conductivity and keeps high mechanical properties.

Description

technical field [0001] The invention relates to a preparation method for improving the thermal conductivity of a thermally conductive polymer, and belongs to the technical field of functional polymer materials. Background technique [0002] In recent years, filling polymer matrix with thermally conductive components to prepare polymer composites with high thermal conductivity has gained more and more attention. In order to prepare polymer materials with high thermal conductivity, many researches and inventions often adopt the preparation method of increasing the filling amount of thermal conductive components to achieve the purpose of improving thermal conductivity. Patent CN1775860A discloses an "injection-molded thermally conductive and insulating plastic", which adds MgO and Al to thermoplastics such as PPS, PA, PBT, ABS or PP 2 o 3 Commonly used thermally conductive fillers, wherein the mass part of the plastic matrix is ​​100, the mass part of the thermally conductiv...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K9/04C08K7/14C08K7/10C08K3/22C08L101/12
Inventor 麦杰鸿易庆锋蒋智强姜苏俊庞承焕陈大华叶南飚蔡彤旻
Owner KINGFA SCI & TECH CO LTD
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