Rubber materials for automobile parts
09-19-2018, 10:24 AM,
#1
Rubber materials for automobile parts
【Feilong Jiangli】Rubber is an important material used in automobiles. Rubber parts on a car account for about 6%~10% of the total vehicle quality. For example, tires, hoses, seals, anti-vibration parts, transmission parts, village cushions and so on, their main characteristics are high elasticity: under the action of a small external, they can produce great elastic deformation (elongation, compression, bending, etc.). After removing the external force, it can return to its original state in a very short time; vibration absorption capacity: rubber can absorb a part of mechanical energy and convert it into thermal energy. Rubber has certain corrosion resistance, wear resistance and insulation.
Rubber is a kind of macromolecule material which is based on raw rubber and is composed of some admixtures (vulcanizate, activator, softener, filler, antioxidant, etc.). According to the source of raw rubber, it can be divided into natural rubber and synthetic rubber.
Natural rubber is a kind of latex collected from rubber trees. After a series of treatments, raw rubber_natural rubber has good comprehensive properties, good elasticity, good thermal plasticity and insulation, tear resistance, low thermal conductivity. The main shortcomings are easy to aging, high temperature resistance, with the increase of time, there will be discoloration, sticky or hardening, brittle cracking.
Synthetic rubber, also known as artificial rubber, uses petroleum, natural gas, coal and agricultural by-products as raw materials, through organic synthesis method to make monomers, through polymerization to produce natural rubber-like polymer materials. There are many kinds of synthetic rubber and their performance characteristics are also different. Synthetic rubber has good physical and mechanical properties, and can be used to make tires and other general rubber products. Styrene-butadiene rubber has good wear resistance, aging resistance, tear resistance, especially good wet skid resistance, but poor heat and cold resistance, poor elasticity. It is mainly used for car tyres. Special synthetic rubber has special properties and is used to make products requiring oil resistance, heat resistance, cold resistance and chemical corrosion resistance.
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