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Maleic anhydride-grafted compatibilizer and its preparation method, and polytetrafluoroethylene composite

A technology of polytetrafluoroethylene and maleic anhydride, which is applied in the direction of coating, etc., can solve the problems of not being able to meet large-scale use requirements, not effectively improving the service life, and not being able to meet actual needs, etc., achieving low cost and long service life , the effect of excellent performance

Inactive Publication Date: 2017-05-10
LANZHOU UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this blending method can greatly improve the acid resistance, alkali resistance and oil resistance of rubber or elastomer sealing materials, it does not effectively improve its service life and cannot meet actual needs.
In the prior art, there are also reports of compounding rubber or elastomer materials with modified materials through commercial adhesives to achieve the purpose of modification. However, this method has high requirements for commercial adhesives. If the adhesiveness of the adhesive is not enough , in the actual use process, the rubber or elastomer material and the modified material are easy to separate or fall off; while the commercial adhesive with good adhesion is very expensive to use and cannot meet the needs of large-scale use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The invention provides a kind of preparation method of maleic anhydride graft compatibilizer, comprises the following steps:

[0020] (1) masticating maleic anhydride and rubber or elastomer to obtain masticated materials;

[0021] (2) Banburying the masticated material obtained in the step (1) with an initiator to obtain a maleic anhydride graft compatibilizer.

[0022] The invention masticates maleic anhydride and rubber or elastomer to obtain masticated materials. In the present invention, the mass ratio of the maleic anhydride to the rubber or elastomer is preferably 50:(0.5-5), more preferably 50:(1-3). In the present invention, the elastomer specifically refers to a copolymer of plastic and rubber. In the present invention, there is no special limitation on the type of the elastic body, and the elastic body well-known to those skilled in the art can be used. In the present invention, the elastomer preferably includes acrylonitrile-butadiene-styrene copolymer (A...

Embodiment 1

[0043] (1) Mix 50g of ethylene-propylene-diene rubber (EPDM) with 2g of maleic anhydride (MAH), and masticate for 70s in a Haake rheometer with a temperature of 140°C and a rotation speed of 70rpm to obtain a masticated material;

[0044] (2) Mix the masticated material obtained in step (1) with 0.1 g of dicumyl peroxide (DCP), and continue banburying for 70 seconds in a Haake rheometer with a temperature of 140° C. and a rotating speed of 70 rpm to obtain Maleic anhydride grafted EPDM rubber compatibilizer (EPDM-g-MAH).

Embodiment 2

[0046] (1) The maleic anhydride grafted EPDM compatibilizer prepared in Example 1 is pulverized and crossed a 100 mesh sieve, and the xylene / hexanaphthene (volume ratio: 1:1) mixed solvents are mixed to obtain a mixed solution;

[0047] (2) coating the mixed solution obtained in the step (1) on the surface of the polytetrafluoroethylene film treated with the sodium naphthalene treatment solution to obtain a coated film;

[0048] (3) The coating film obtained in the step (2) is coated on the surface of EPDM rubber, and the temperature is 187 ℃, and the pressure is 10Mpa. The composite treatment is 5min in a flat vulcanizer to obtain polytetrafluoroethylene-three Ethylene propylene rubber compound.

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PUM

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Abstract

The invention provides a preparation method of a maleic anhydride-grafted compatibilizer, comprising: plasticizing maleic anhydride and rubber or elastomer to obtain plasticized material; internally mixing the plasticized material and an initiator to obtain the maleic anhydride-grafted compatibilizer. The maleic anhydride-grafted compatibilizer prepared by using the method provided herein can provide good combination of polytetrafluoroethylene and rubber or elastomer, and the obtained polytetrafluoroethylene-rubber composite or polytetrafluoroethylene-elastomer composite has excellent service performance, high tear strength and long service life. In addition, the preparation method of the maleic anhydride-grafted compatibilizer provided herein is simple to perform, low in cost and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of polymer material grafting, in particular to a maleic anhydride grafting compatibilizer and a preparation method thereof, and a polytetrafluoroethylene composite material. Background technique [0002] The plate heat exchanger is a new type of high-efficiency heat exchanger stacked by a series of metal sheets with a certain corrugated shape. It has high heat exchange efficiency, small heat loss, compact and light structure, small footprint, and easy installation and cleaning. , wide application, long service life and so on. Under the same pressure loss, its heat transfer coefficient is 3 to 5 times higher than that of the shell and tube heat exchanger, and its floor area is one-third of that of the tube heat exchanger, and the heat recovery rate is as high as 90%. Between the different sheets of the plate heat exchanger, there are specially designed sealing gaskets to prevent fluid leakage and maintain pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/06C08F279/02C08F222/06C08J7/04C08L27/18
CPCC08F255/06C08F279/02C08J2327/18C08J2451/04C08J2455/02C08J7/0427C08F222/06
Inventor 陈振斌刘忠元陈长军张锦钱发鑫周永山他维成高毓襄耿进康
Owner LANZHOU UNIVERSITY OF TECHNOLOGY