Most Organic peroxides are colorless to light yellow liquid, or solid from white powder to crystal. It is generally acidic, mostly insoluble in water, soluble in organic solvents such as Phthalic acid and dimethyl ester, and is a class of unstable flammable and explosive chemicals.
In the fiber material industry, Organic peroxides is used as the initiator of free radical polymerization, the initiator of thermal polymerization reaction, the coupling agent of vulcanized rubber and plastic, the epoxy curing agent of unsaturated polyester, and the relative molecular weight and the relative molecular weight distribution conditioner in the production of spinning grade polypropylene. Organic peroxides is used as the free radical source in the following main uses: ① single free radical polymerization and copolymerization initiator of methacrylate and diene; ② Vulcanizing agent for thermosetting resins; ③ A coupling agent for polyurethane elastomers and high-pressure polyethylene.
In addition to the industrial production of the fiber material, Organic peroxides is used as a photoinitiator and sensitizer for the industrial production of film, used as a photosensitive fiber material, a photosensitive epoxy resin, etc., and is also commonly used in the production of epoxy resin adhesive; At the level of medical materials, the initiator composed of Organic peroxides and drugs is used to generate the cultivation matrix (such as liposomes, pellets, and drug films) for drug retarding administration; At the organic generation level, Organic peroxides is mainly used as reducing agent and ring reducing agent. In addition, Organic peroxides is also used in medical machinery and food disinfection, textile products, printing paper and other daily industrial bleach, decolorizer, pesticide, cleaner, etc.
The main use of a Organic peroxides is determined by its very high dissolution temperature at a reasonable speed. Other key factors include cost, solubility and Factor of safety. The types of efficient and converted free radicals, the importance of refrigerated storage and freight logistics, compatibility with production systems, potential hazards to commodities, and the ability to be activated. Organic peroxides can be dissolved and converted into reactive free radicals at a certain rate under high temperature or room temperature.
All Organic peroxides are thermally unstable, and their dissolution accelerates with the increase of temperature. The common quantitative analysis method for Organic peroxides reactivity is to measure the half-life of drugs, that is, it takes time for a certain amount of peroxide to dissolve to half of its original amount at a special temperature. Today, the half-life data of Organic peroxides products can be obtained in the hard disk of the computer. By using a computer program, suitable peroxides can be selected for a certain aggregation or processing process standard.
This free radical can be added to Unsaturated fat methacrylate to cause polycondensation reaction, such as butadiene, vinyl chloride or Methyl methacrylate. Some free radicals also attack polymers such as PE to convert them into free radicals on the chain. When two types of high polymer radicals fuse together, a chemical cross-linking structure is formed.