What are the manifestations of chemical stability of tire rubber?

The chemical stability of tire rubber is mainly reflected in the following aspects:

1、 Aging resistance

Tire rubber is subject to environmental factors such as ultraviolet radiation, ozone, moisture, and heat during use, leading to the breakage of rubber molecular chains and the destruction of cross-linking structures, thereby reducing tire performance. High quality tire rubber raw materials usually contain anti-aging agents, which can resist the erosion of these environmental factors, slow down the aging speed of tires, and thus extend the service life of tires.

2、 Corrosion resistance

Tires may come into contact with various corrosive substances such as acids, alkalis, salts, etc. during driving. High quality tire rubber raw materials have better corrosion resistance, which can resist the erosion of these substances and maintain the integrity and performance of tires. For example, certain synthetic rubbers such as hydrogenated nitrile rubber (HNBR) and fluororubber (FKM) have excellent corrosion resistance and can maintain stable performance in harsh chemical environments.

3、 Solvent resistance

Tire rubber also needs to have good solvent resistance, which means it can resist the dissolution and swelling effects of solvents. This is crucial for maintaining stable performance of tires when in contact with solvents such as gasoline and engine oil. Some special tire rubber formulas, such as using specific additives or crosslinking agents, can enhance the solvent resistance of tires.

4、 Flame resistance

The flame resistance of tire rubber is also an important aspect of its chemical stability. High quality tire rubber raw materials usually have lower combustion rates and higher flame retardant properties, which can reduce the risk of fire to a certain extent. In addition, some tire rubber also adds flame retardants to improve its flame resistance.

5、 The synergistic effect of chemical stability and additives

The chemical stability of tire rubber depends not only on the quality of its basic raw materials, but also closely related to the various chemical additives added. These additives, such as vulcanizing accelerators, reinforcing agents, softeners, anti-aging agents, etc., play their unique roles in tire rubber, jointly improving the chemical stability of tires. For example, vulcanization accelerators can accelerate the vulcanization process of tire rubber and form stable cross-linked structures; Reinforcing agents such as carbon black can significantly improve the wear resistance and cutting resistance of tires; Softening agents can improve the elasticity and toughness of tire rubber.

In summary, the chemical stability of tire rubber is one of the important guarantees for tire quality and performance. By optimizing the formula and process conditions of tire rubber, the chemical stability of tires can be further improved to meet the needs of various complex environments.