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Low-water-absorptivity heat-conducting wear-resistant polymer alloy, and preparation method and application thereof

A polymer, low water absorption technology, applied in the field of polymer alloy materials, can solve the problems of high friction coefficient between rubber and shaft metal, low dimensional accuracy of polyurethane molding, poor dimensional stability, etc., and achieve high dimensional stability, weight reduction and cost. low effect

Active Publication Date: 2013-11-20
肇庆市端州区广德润机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, single-material polymer bearings also have certain defects
For example, after nylon absorbs water, its volume expands, its dimensional stability is poor, the friction coefficient between rubber and shaft metal is relatively high, and the dimensional accuracy of soft polyurethane molding is low, etc.

Method used

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  • Low-water-absorptivity heat-conducting wear-resistant polymer alloy, and preparation method and application thereof
  • Low-water-absorptivity heat-conducting wear-resistant polymer alloy, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Preparation of low water absorption, thermal conductivity and wear-resistant polymer alloy

[0039] (1) Surface treatment of graphite powder and carbon fiber: use plasma activation instrument (model is plasma cleaning experimental equipment EPT-02, produced by Suzhou Aopus Plasma Technology Co., Ltd.) to irradiate and activate graphite powder (high thermal conductivity flake shape, Shanghai Humai Composite Material Co., Ltd.) and carbon fiber (wd-3 / / 200, Dongguan Carbon Cable Composite Material Co., Ltd.), clean the surface and activate its surface sites at the same time.

[0040] Then use acetone-dispersed silane coupling agent (KH-550, produced by Beijing Shenda Fine Chemical Co., Ltd.) to dry treat carbon fiber and graphite powder for 1 to 3 hours. The operation is as follows: add 350mL toluene, 50g graphite powder or carbon fiber , 0.5g of silane coupling agent, pass into N 2 , at N 2 The temperature was raised to 85°C under airflow and the reaction was...

Embodiment 2

[0043] Example 2: Preparation of low water absorption, thermal conductivity and wear-resistant polymer alloy

[0044] (1) The treatment of graphite powder and carbon fiber, and the drying of PP, PA66, and PP-g-MA are the same as in Example 1.

[0045] (2) Mix 45g of PP with a melt index of 2g / min, 45g of PA66 with a melt index of 40g / min and 10g of PP-g-MA evenly, and melt blend (180°C) in a twin-screw granulator to obtain a total Mixture: Take 70g of the above-mentioned blend, add 10g of graphite powder, 20g of carbon fiber and mix evenly, melt and blend in a twin-screw extruder, extrude and granulate. The temperature of each section of the extruder is 170°C, 185°C, 190°C, 200°C, 220°C, 225°C, 250°C respectively. A low water absorption, thermal conductivity and wear-resistant polymer alloy is obtained.

Embodiment 3

[0046]Example 3: Preparation of low water absorption, thermal conductivity and wear-resistant polymer alloy

[0047] (1) The treatment of graphite powder and carbon fiber, and the drying of PP, PA66, and PP-g-MA are the same as in Example 1.

[0048] (2) Mix 45g of PP with a melt index of 2g / min, 45g of PA66 with a melt index of 40g / min and 10g of PP-g-MA evenly, and melt blend (180°C) in a twin-screw granulator to obtain a total Mixture: Take 60g of the above-mentioned blend, add 10g of graphite powder, 30g of carbon fiber and mix evenly, melt and blend in a twin-screw extruder, extrude and granulate. The temperature of each section of the extruder is 170°C, 185°C, 190°C, 200°C, 220°C, 225°C, 250°C respectively. A low water absorption, thermal conductivity and wear-resistant polymer alloy is obtained.

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Abstract

The invention belongs to the technical field of polymer alloy materials, and discloses a low-water-absorptivity heat-conducting wear-resistant polymer alloy, and a preparation method and application thereof. The low-water-absorptivity heat-conducting wear-resistant polymer alloy comprises the following components in percentage by mass: 20-80% of PP / PA66 (polypropylene / polyamide 66) alloy phase, 5-30% of graphite powder and 10-50% of carbon fiber. The PP / PA66 alloy phase comprises the following components in percentage by mass: 20-70% of PP, 25-70% of PA66 and 5-25% of compatilizer. The low-water-absorptivity heat-conducting wear-resistant polymer alloy disclosed by the invention has excellent properties: the weight is lowered by 50%, the relative volume abrasion is lower than 250 mm<3>, the dynamic friction (dry) coefficient is less than 0.15, the maximum water absorptivity is lower than 0.1%, the heat conductivity coefficient is up to 4.35 W / m.k, the tensile strength is greater than 60 MPa, and the service life is prolonged by 100%.

Description

technical field [0001] The invention belongs to the technical field of polymer alloy materials, and in particular relates to a low water absorption, heat conduction and wear-resistant polymer alloy, a preparation method and application thereof. Background technique [0002] Many equipment in industries such as ships, pumps, hydropower, wind power and wave power contain sliding bearing parts, which are currently mostly made of metal materials. In practical applications, people have gradually found that metal bearings have problems such as large wear, severe corrosion, poor thermal conductivity, short life, and high cost. Because polymer materials are light in weight, corrosion-resistant, and easy to form, polymer bearings have been initially applied to these fields. The main materials include nylon, rubber, polyoxymethylene, polytetrafluoroethylene, polyether ether ketone, and polyurethane. However, the polymer bearing of a single material also has certain defects. For exam...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L77/06C08L51/06C08K13/06C08K9/04C08K3/04C08K7/06
Inventor 林志丹邓淑玲徐保峰
Owner 肇庆市端州区广德润机电有限公司
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