what is the purpose and the performance of Natural rubber?

the purpose and the performance of Natural rubber
Health and natural rubber glue temperature glass of -72 ℃, plastic flow temperature 130 ℃, the beginning of decomposition temperature 200 ℃, intense decomposition temperature 270 ℃. When natural rubber vulcanization, the increase in Tg, it will not happen again flow.
Natural rubber flexibility
Rubber and its cross-linking density is not too high vulcanizate flexibility is high. For example, 0-100 ℃, flexibility in the back between 50-85 ℃, the modulus of elasticity of steel is only 1 / 3000, the elongation up to 1000 percent, stretching to 350%, after the permanent back Deformation of only 15% of natural rubber flexibility relatively high, second only to the common rubber in butadiene rubber.
The strength of natural rubber
In the elastic material, natural rubber, raw rubber, rubber, rubber vulcanization of higher intensity. Vulcanization of rubber is not known as the tensile strength of Green's strength, natural rubber Green strength of up to 1.4 ~ 2.5Mpa, the appropriate strength for the green rubber molding process is necessary. Natural rubber has a higher tear strength, up to 98kN / m, its wear resistance is also good. Natural rubber high mechanical strength because it is self-reinforcing rubber, when the time will stretch along the chain molecules form a crystal orientation of the direction of stress.
The electrical properties of natural rubber
Natural rubber non-polar material is a good insulating material. When natural rubber vulcanization, as a result of the introduction of polar factors, such as sulfur, to promote, etc., so that the insulation performance.
Natural rubber-resistant properties of media
Natural rubber is a non-polar substances, which dissolve in non-polar and non-polar solvent oil. Cyclohexane intolerance natural rubber, gasoline, benzene, and other media, not vulcanized rubber in the above-mentioned medium dissolved, the vulcanized rubber is swelling. Natural rubber is not soluble in the polar acetone, ethanol, not soluble in water, 10% hydrofluoric acid-resistant, 20% of hydrochloric acid, sulfuric acid 30%, 50% sodium hydroxide and so on.
The main use of natural rubber
Natural rubber for its highly flexible and sound insulation, plastic, impermeable trap, tensile and wear characteristics, widely used in industry, agriculture, defense, communications, transportation, machine building, medicine and public health in the field And daily life, and so on, such as transportation, with the tire; industry with the transport belt, belt, a variety of ring; of medical gloves, vascular lose; used in the daily life of the rubber shoes, raincoats, are Nuanshui Dai The main raw materials for rubber manufacturers, defense of the use of aircraft, artillery, tanks, even the most advanced technology in the field of rockets, satellites, spacecraft, space shuttles have to be a lot of rubber parts