Basic mechanism of reaction

The gas phase reactions which may be undergone by HO 2 depend on the conditions. It is these elementary steps which are involved in the slow reaction and at the third limit. Salt coated vessels may be assumed to be moderately or highly efficient for the destruction of hydroperoxyl at the surface. In such vessels the radical concentration is likely to be low and reactions between radicals are unlikely to be important. The reactions proposed for the HO2 under these conditions were (xi) [1, 23], or (xia) [7], the first of which leads to the formation of hydrogen peroxide and has since been shown to be the faster of the two [45]. Assuming that the hydrogen peroxide is decomposed without formation of further chain centres, reactions (iv) and (xi) then form a chain propagating cycle which continues until either a H or HO2 is destroyed at the vessel surface. 

In terms of the explosion limit conditions, the occurrence of reaction 

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Secondary reactions usually proceed in addition to template polymerization of the system template-monomer-solvent. They influence both kinetics of the reaction and the structure of the reaction products. Depending on the basic mechanism of reaction, typical groups of secondary reactions can take place. For instance, in polycondensation, there are such well known reactions as cyclization, decarboxylation, dehydratation, oxidation, hydrolysis, etc. In radical polymerization, usually, in addition to the main elementary processes (initiation, propagation and termination), we have the usual chain transfer to the monomer or to the solvent which change the molecular weight of the product obtained. Also, chain transfer to the polymer leads to the branched polymer. 

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