Organic peroxide refers to the molecular composition of organic compounds containing peroxide, its own flammable and explosive, very easy to decompose, heat, Organic Peroxides vibration or friction is extremely sensitive.
Organic peroxide is the source of free radicals in the following uses: Free radical polymerization and copolymerization initiator of ① vinyl and two monomer, ② curing agent of thermosetting resin, crosslinking agent of ③ elastomer and polyethylene.
The decomposition temperature of organic peroxide at an effective rate determines its use in a large extent. Other important factors are cost, solubility, and safety. The efficiency and the types of free radicals generated, the necessity of refrigerated storage and freight, Organic Peroxides and the compatibility with production systems may affect the product and the ability to be activated. Organic peroxide can control a certain velocity decomposition at high temperature or at room temperature to generate reactive free radicals.
All organic peroxides are thermally unstable and are decomposed faster with increasing temperature. The commonly used quantitative method for the reactivity of organic peroxides is to determine the half-life, Organic Peroxides which is the time it takes to decompose a certain amount of peroxide at a given temperature to half its initial volume. Now, the half-life data of the commercial organic peroxide can be obtained from the computer floppy disk. Use a Computer menu program to select the appropriate peroxide for an aggregation or process condition.
These free radicals can be added to unsaturated vinyl monomers such as: styrene, vinyl chloride or methyl methacrylate to induce polymerization. Some free radicals also attack polymers such as PE to generate free radicals on the chain. When two such polymer free radicals are bonded together, Organic Peroxides a cross-linked structure is formed.
Organic peroxides, which contain peroxide (-o-o-), exhibit strong oxidation properties, and most can be used as oxidant. Because organic peroxide also contains a reductive structure, Organic Peroxides such as carbon hydrogen bond, it possesses all the material conditions of redox reaction, so the organic peroxide is more dangerous than other oxidants. such as: benzoyl peroxide, acetic acid, peroxide methyl ethyl ketone, and so on, are very prone to explosive oxidation decomposition reaction.
The decomposition product of organic peroxide is a lively free radical, and the reaction by free radicals is very difficult to restrain by the conventional inhibition method. Organic Peroxides Because many of its decomposition products are gas or volatile substances, coupled with the provision of oxygen, prone to explosive decomposition. The more oxygen content in organic peroxide, the lower the decomposition temperature, the greater the risk. A strong explosion may occur if the 24h is deposited after oxidation of diacetyl; benzoyl peroxide when water content is below 1% (mass fraction), a slight friction can explode; the ℃ of diisopropyl carbonate is unstable at more than 10, and the explosion is exploded when 17.22 ℃ is reached. Peracetic acid (acetic acid) Pure and unstable, 40% of the solution in the storage process can still decompose oxygen, heating to 110 ℃ when the explosion. Organic Peroxides It is not difficult to see that organic peroxide is very sensitive to temperature and external force, and its danger and harmfulness are greater than other oxidants.
Organic peroxides are flammable and fast-burning and can quickly turn into explosive reactions. such as: The flash point of peracetic acid is 40.56 ℃, the flash point of formic acid is 40 ℃, Organic Peroxides the flash point of the peroxide tert-Butanol is 26.67 ℃, the flash point of the Peroxide di-tert-butanol is 18.33 ℃, and the flash point of the Peroxide di-tert-butyl ester is only 12 ℃.