What Is The Influence Of Stearic Acid Iodine On Rubber ?

Stearic acid is commonly used rubber antioxidant

stearic acid iodine value is an important indicator when it is used as an antioxidant. The higher iodine value of stearic acid, the better anti-aging effect on rubber. The main function of stearic acid in rubber products is to prevent oxidative aging. After oxidative aging, rubber products will appear cracking, hardness reduction, crack resistance and other problems.

Second, the effect of iodine value of stearate on the hardness of rubber

stearate iodine value of high stearate molecules are more closely arranged, and have a better protective effect on the cross-linking of rubber molecules, so it can improve the hardness of rubber. However, too high iodine value of stearate will also make the rubber hardness too high, affecting the use of rubber products. Therefore, it is very important to select the right iodine stearate value.

Three, the effect of iodine stearate value on the heat resistance of rubber

Rubber in high temperature environment prone to aging, hardening, cracking and other problems. Stearic acid with high iodine value also has better effect in accelerated aging test. Therefore, when preparing high-temperature and durable rubber products, it is necessary to choose stearic acid with high iodine value as an antioxidant to improve the heat resistance of rubber.

Fourth, the effect of iodine value of stearic acid on rubber cracking resistance

Stearic acid in rubber can not only play an aging role, but also play a certain role in enhancing the tensile strength, elongation, fracture ability and other properties of rubber, so it has a great impact on the cracking resistance of rubber. Choosing the appropriate iodine value of stearate can improve the cracking resistance of rubber products and prolong the service life.

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