How do rubber undergo vulcanization?
Vulcanization of rubber can be divided into three categories: cold vulcanization, room temperature vulcanization and heat vulcanization according to the curing conditions.1. Cold vulcanizing products impregnated in a solution of carbon disulfide containing 2% to 5% sulfur chloride.2, room temperature vulcanization, the use of room temperature vulcanized mortar (mixed rubber solution) for vulcanization.
Rubber vulcanization is a chemical reaction process, before vulcanization rubber is present in a linear molecular form, is the linear sulfide molecules through some other substances (such as sulfur and peroxide) connected together to form a three-dimensional network structure. Sulfur must not be used with sulfur material, as long as the rubber linear molecules can be linked together to form a body shape on the lineEach rubber formulation has an optimum curing temperature, which increases the speed of vulcanization within a certain range, but the performance of the product decreases
In the process of hot vulcanization, the general temperature is 10 degrees higher, and the curing time is shortened by about half. Rubber is a bad conductor of heat, which can easily cause uneven vulcanization.
Heat vulcanization can be divided into three methods: direct vulcanization, indirect vulcanization and mixed gas vulcanization. Direct vulcanization; vulcanizing in hot water or steam medium. Indirect vulcanization, vulcanization in hot air. Third, gas vulcanization, first vulcanization with air, and then direct steam vulcanization.
