Preparation method of heat-conducting polyvinyl chloride composite material with microwave absorption characteristic

A technology of polyvinyl chloride and composite materials, applied in the field of PVC composite materials, can solve the problems of large amount of fillers, lack of thermal conductivity, affecting material processing and mechanical properties, etc., and achieve excellent wave-absorbing performance and high thermal conductivity.

Inactive Publication Date: 2012-10-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the amount of filler added seriously affects the processing and mechanical properties of the material, and the material does not have thermal conductivity

Method used

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  • Preparation method of heat-conducting polyvinyl chloride composite material with microwave absorption characteristic
  • Preparation method of heat-conducting polyvinyl chloride composite material with microwave absorption characteristic
  • Preparation method of heat-conducting polyvinyl chloride composite material with microwave absorption characteristic

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Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0022] The formula is shown in Table 1.

Embodiment 4

[0036] A method for preparing a thermally conductive polyvinyl chloride composite material with microwave absorption properties, comprising the following steps:

[0037] (1) Add 100 parts by weight of PVC resin, 2 parts by weight of heat stabilizer, 0.5 parts by weight of lubricant, 0.1 part by weight of processing aid and 30 parts by weight of plasticizer in the high-speed kneader, and wait until the materials are completely plasticized. material, and the discharge temperature is controlled at 80°C to obtain a PVC premix, wherein the degree of polymerization of the PVC resin is 800; the heat stabilizer is organotin maleate; the lubricant is polyethylene oxide; the processing aid is monohard Glyceryl esters; the plasticizer is diethyl phthalate;

[0038] (2) Add 100 parts by weight of PVC premix in the haake mixer, 3 parts by weight of multi-walled carbon nanotubes with a diameter of 5 nm and a length of 0.5 μm, and 5 parts by weight of zinc oxide with a particle diameter of 0...

Embodiment 5

[0040] A method for preparing a thermally conductive polyvinyl chloride composite material with microwave absorption properties, comprising the following steps:

[0041] (1) Add 100 parts by weight of PVC resin, 5 parts by weight of heat stabilizer, 2 parts by weight of lubricant, 4 parts by weight of processing aid and 60 parts by weight of plasticizer in the high-speed kneader. material, and the discharge temperature is controlled at 100°C to obtain a PVC premix, wherein the degree of polymerization of the PVC resin is 2000; the heat stabilizer is lead dibasic phosphite; the lubricant is calcium stearate; the processing aid is acrylic acid methyl ester; the plasticizer is di-n-octyl phthalate;

[0042] (2) Add 100 parts by weight of PVC premix in haake mixer, 8 parts by weight of diameter is 100nm, multi-walled carbon nanotubes with length of 10 μm, 30 parts by weight of particle diameter is zinc oxide of 2 μm, temperature of mixer at 170°C, and mixed for 5 minutes, a therm...

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Abstract

The invention relates to a preparation method of a heat-conducting polyvinyl chloride (PVC) composite material with microwave absorption characteristic. The preparation method comprises the following steps of: fully plasticizing PVC resin, a thermal stabilizer, a lubricant, a processing auxiliary agent and a plasticizer to obtain a PVC premix; and adding into a haake internal mixer together with multi-wall carbon nanotubes and zinc oxide for internal mixing to prepare the heat-conducting polyvinyl chloride composite material with microwave absorption characteristic. Compared with the prior art, the adopted multi-wall carbon nanotubes and zinc oxide have synergistic wave absorption and heat conduction effects; and when the PVC content is 100 parts, the using amount of the carbon nanotubes is 5 parts and the using amount of the zinc oxide is 10 parts, the coefficient of thermal conductivity of the PVC composite material is 0.366 W / (mk), the lowest reflectivity is -32.7dB, and the frequency range is 3.12 GHz when the reflectivity is lower than -10dB.

Description

technical field [0001] The invention relates to a PVC composite material, in particular to a preparation method of a heat-conducting polyvinyl chloride composite material with microwave absorption characteristics. Background technique [0002] With the widespread use of electronic equipment. Environmental pollution and harm caused by electromagnetic radiation have aroused people's high attention. Electromagnetic interference (EMI) not only endangers human health and safety, but also causes sensitive equipment to malfunction. cause serious consequences. Especially in the fields of medical treatment, military and aviation, the leakage of electromagnetic waves is more harmful. [0003] PVC material has a wide range of uses, and has the characteristics of good processing performance, low manufacturing cost, corrosion resistance, good insulation, etc., and low thermal conductivity (0.13-0.17W / mk). [0004] Engineering Plastics Application 2006, Volume 34, Issue 2 reported tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/04C08K3/22C08K7/00B29B7/00
Inventor 张爽翟滢皓张勇
Owner SHANGHAI JIAO TONG UNIV
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