Composite material combining PVC (Polyvinyl Chloride) elastomer with super high molecular weight and fluorubber and preparation method thereof

Abstract

The invention discloses a composite material combining PVC (Polyvinyl Chloride) elastomer with super high molecular weight and fluorubber. The composite material is prepared from the following raw materials in parts by weight: 50-90 parts of fluorubber, 9-30 parts of PVC elastomer with super high molecular weight and 1-20 parts of nanometer carbon black with surface modified by a silane coupling agent, wherein the silane coupling agent is N'-vinyl benzyl-N-trimethoxysilane propyl ethylenediamine salt. The invention modifies the surface of the nanometer carbon black by adopting the silane coupling agent VTSD and realizes a nanometer carbon black/PVC/fluorubber multi-phase composite structure with uniform dispersion in mixing rubber so that the modified nanometer carbon black effectively reinforces PVC/fluorubber. The invention also discloses a preparation method of the composite material, and the method is simple, easy to control and suitable for industrial production.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to an ultra-high molecular weight polyvinyl chloride elastomer combined with fluorine rubber composite material and its preparation. Background technique [0002] With the rapid and healthy development of China's railways in the direction of high speed and heavy load, the properties of materials used in rail transit trains are more extensive and more demanding. At present, high-speed railways have run through the severe cold areas in the north to the hot and humid areas in the south, running between plateaus and mountains at high speed. The climate and environment of different regions have put forward higher requirements for the materials on high-speed trains, especially rubber polymer materials. Because the glass transition temperature of rubber is generally lower than room temperature, it can be used as a highly elastic material. 40% of the polymer materials used in rail transit...

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Problems solved by technology

Ethylene-propylene rubber has excellent elasticity and low temperature resistance, and its electrical insulation performance is also extremely superior, but it is a flammable material; the molecular chain of chloroprene rubber contains chlorine atoms, so it has the best flame resistance among general-purpose rubbers, but due to Regularity of molecular structure, there will be obvious crystallization tendency at low temperature, which will cause the material to harden and affect the use; silicone rubber has excellent low temperature resistance, and the brittleness temperature reaches -120 ° C, and has good ozone resistance and light aging resistance performance, but if it is used as a corrugated expansion tube for cable protection on trains, there is a problem of large compression permanent deformation; fluororubber is a high-performance rubber that has developed rapidly in recent years. It is a combination of corrosion resistance, High-strength rubber material with high temperature resistance, weather resistance, ozone resistance and flame retardancy, but its low temperature resistance is average, and the limit temperature for maintaining elasticity is only -15°C

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