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Peroxides Are Widely Used

Jul 05, 2017

Organic peroxide as a resin, rubber, plastic synthesis process commonly used free radical initiator, in the chemical synthesis industry is widely used. However, organic peroxides have the characteristics of easy decomposition, at a lower temperature easily decompose to produce a large number of free radicals, Organic Peroxides followed by a lot of heat and gas, in the event of fire or heat, easy to cause combustion explosion. In the storage and transportation process by adding dilution stabilizer is to improve its thermal stability of the common methods, but the systematic study of the stability of the stabilizer mechanism, Organic Peroxides and its feasibility assessment of industrial applications, there are not many reports. The same time as the above-

The organic peroxide is a derivative of one or two hydrogen atoms in the hydrogen peroxide which are substituted by an organic group, and the general formula is R-O-O-R. Since 1858 Brudie synthesis of benzoyl peroxide for the first time, has gone through 100 years of history. At present, there are more than 70 varieties of organic peroxides that have been industrialized abroad. Only AkzoNobel, a company in the Netherlands, can provide up to 46 kinds of organic peroxides. In this paper, the properties, Organic Peroxides classification and application of organic peroxides are reviewed in this paper.

Organic peroxides generate heat by heat, and the temperature depends on the weakest bond cleavage energy in the molecule of the compound. Different molecules, different bonds of the cleavage energy is also different, therefore, organic peroxide activity depends not only on its type, but also closely related with the substituents. Organic Peroxides The groups on the carbon atom attached to the peroxy bond have a significant effect on the peroxide activity. Such as increasing the alkylation of peroxides, can reduce the half-life by 60 times; the same effect on the diacyl peroxide greater impact, half-life can even shorten 9000 times. For the same peroxide, Organic Peroxides the temperature increases and the half-life is shortened. With the increase of pressure, peroxide stability increased, half-life greatly improved, if from atmospheric pressure to 300MPa


, The peroxide half-life will increase exponentially because the rate constant of the decomposition reaction decreases with increasing pressure or temperature. If the peroxide contains a large group, the half-life is more sensitive to pressure.

Organic peroxide transport requirements

In the United Nations TDG Regulations, organic peroxides are classified as hazardous substances in Article 5.2. Taking into account its unique hazardous properties, Organic Peroxides certain organic peroxides must be controlled at the time of transport, and certain organic peroxides need to be filled by the addition of diluents or by the use of inert solids to reduce their reactivity.

At the same time, should avoid eye contact with organic peroxide. Some organic peroxides, even in short contact, can cause serious injury to the cornea or corrosive to the skin.

At present, organic peroxides that are allowed to be transported by container have been listed in the list of organic peroxides in TDG (see Annex). For each substance that is allowed to be transported, the generic items (UN numbers 3101 to 3120) are assigned to the list, and the corresponding secondary hazards and notes on the transport information are provided. Examples are shown in Table 3.