Rubber is an important strategic materials, in the military and defense applications is very broad, for example, a tank to use more than 800 kilograms of rubber; a 30,000-ton warships to use sixty-eight tons of rubber, almost the military equipment, air force facilities, national defense projects have rubber footprints.
The use of rubber made of ships, tents, warehouses and protective gear, water bath clothing and many other varieties. As for the defense of cutting-edge technology needs of high temperature, low temperature, oil, high vacuum and other special properties of rubber products is indispensable.
With the development of national defense modernization, the requirements can withstand the temperature range of minus 100-400 ℃, and can resist a variety of acids, alkalis and oxidants with special properties of rubber, is being developed and produced.
Expanded Information
General-purpose rubber has better overall performance and is widely used. Mainly:
①Natural rubber, from the latex of the three-leaf rubber tree, the basic chemical composition of cis - polyisoprene. Good elasticity, high strength, good overall performance.
②Isoprene rubber, full name is cis-1,4-polyisoprene rubber, high cis synthetic rubber made from isoprene, because of its structure and properties similar to natural rubber, it is also known as synthetic natural rubber.
3 styrene butadiene rubber, referred to as SBR, made from butadiene and styrene **** polymerization. According to the production method is divided into emulsion polymerization of styrene butadiene rubber and solution polymerization of styrene butadiene rubber. Its comprehensive performance and chemical stability.
4 cis-butadiene rubber, the full name of cis-1,4-polybutadiene rubber, abbreviated BR, produced by the polymerization of butadiene. Compared with other general-purpose rubber, vulcanized cis-butadiene rubber is particularly excellent in cold resistance, abrasion resistance and elasticity, less heat under dynamic load, good aging resistance, easy to use with natural rubber, chloroprene rubber, nitrile rubber and so on.
⑤Chloroprene rubber, CR for short, produced by the polymerization of chloroprene. Has a good overall performance, oil resistance, flame resistance, oxidation resistance and ozone resistance. However, its density is large, easy to crystallize and harden at room temperature, bad storage, poor cold resistance.
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