Organic peroxides are the most important vulcanizing agent, the crosslinker. Organic peroxide derived from oxygen peroxide. Rubber vulcanization with peroxide, the required decomposition rate appropriate, stable storage, operating conditions, safety, good curing effect, in the peroxy group with the primary carbon atoms or secondary carbon The peroxide of the atom is unstable.
An organic compound containing -O-O-peroxy functional group formed by replacing hydrogen atoms in hydrogen peroxide with an organic group such as an alkyl group, an acyl group, an aromatic group or the like. Characterized by heating more than a certain temperature will decompose to produce oxygen free radicals, unstable, Organic Peroxides easy to break down. Chemical production of organic peroxides is mainly used for synthetic resin polymerization initiator, catalyst. In the field of polymer materials, it can be used as a radical polymerization initiator, graft reaction initiator, rubber and plastic cross-linking agent, unsaturated polyester curing agent and spinning grade polypropylene in the preparation of molecular weight and Molecular weight distribution regulator. Environmental pollution in the air under the action of light through the free radical reaction can produce peroxide acyl nitrates compounds, photochemical oxidants in one of the species. On the skin, eyes, mucous membrane has a strong irritant, Organic Peroxides is an important pollutant in the atmosphere. Such substances are flammable and explosive dangerous goods, the use should pay attention to safety. Generally, the active oxygen content, activation energy, half-life and decomposition temperature were used as the basis of selection.
The structural characteristics of the peroxy functional groups in organic peroxides dictate that the peroxides have the following chemical properties:
(1) has a strong oxidation.
(2) with natural decomposition properties, above 40 ℃, Organic Peroxides most of the peroxide active oxygen decreased.
(3) acid, alkaline substances can promote decomposition. Strong acid and alkali metals, alkaline earth metal hydroxides (solid or high concentration of aqueous solution) can cause intense decomposition.
(4) iron, cobalt, manganese organic peroxides and redox system compounds significantly promote decomposition.
(5) Strongly reducing amine compounds and other reducing agents significantly promote decomposition.
(6) iron, lead and copper alloy can promote its decomposition.
(7) rubber can promote its decomposition.
(8) friction, shock or shock storage containers caused by local temperature rise, Organic Peroxides can promote decomposition.