Principle of rubber vulcanization
The rubber becomes soft when heated, becomes hard and brittle when it is cold, is not easy to be formed, is easy to wear, and is easily soluble in organic solvents such as gasoline. It has double bonds in the molecule, which is easy to cause addition reaction and easy to age. In order to improve the performance of rubber products, a series of processing is performed on raw rubber with industrial equipment such as rubber curing ovens. Under certain conditions, the raw rubber in the rubber and the vulcanizing agent are chemically reacted to form a linear structure. The macromolecules are cross-linked into macromolecules with a three-dimensional network structure, so that the rubber material has excellent properties such as high strength, high elasticity, high wear resistance, corrosion resistance, and the like. This process is called rubber vulcanization. The vulcanization process is generally divided into four stages, induction-presulfurization-normal sulfurization-persulfurization. In order to achieve this reaction, energy must be added to reach a certain vulcanization temperature, and then the rubber is kept at the vulcanization temperature range to complete the entire vulcanization reaction.

The origin of rubber vulcanization
Vulcanization is the basic process for rubber compounds to form a three-dimensional network structure through the cross-linking of raw rubber molecules. Different curing systems are suitable for different raw rubbers. Rubber (raw rubber) as the main body, and a variety of auxiliary materials made of a composite body (there are several major systems of auxiliary materials, filling reinforcement, vulcanization, protection, plasticization, special substance additives, etc.) A treatment method after the insulation layer or the sheath layer is to make the vulcanization system in the auxiliary system work, to permanently crosslink the rubber, increase elasticity, and reduce plasticity. The term vulcanization is because the earliest time is used
Sulfur vulcanizes rubber, so it is still used today.