What is it about?

On the addition of free radicals to the double bonds of molecules of olefins, formaldehyde and oxygen by the nonbranched-chain mechanism.

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Why is it important?

For the first time simple kinetic equations were obtained (i.e, with 1-2 parameters to be determined directly) connecting the process speed with the component concentrations. These equations provide good fits for the nonmonotonic (peaking) dependences of the formation rates of the molecular products (1:1 adducts) on the concentration of the unsaturated component in binary systems consisting of a saturated component (hydrocarbon, alcohol, etc.) and an unsaturated component (alkene, allyl alcohol, formaldehyde, or dioxygen). The unsaturated compound in these systems is both a reactant and an autoinhibitor generating low-reactive free radicals.

Perspectives

In the case of free radical addition to molecular oxygen is a new mechanism of free-radical nonbranched-chain oxidation in which the oxygen with the increase of its concentration begins to act as an oxidation autoinhibitor (or an antioxidant), and the rate of peroxide formation as a function of the dissolved oxygen concentration has a maximum.

Dr Michael M. Silaev
Lomonosov Moscow State University

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This page is a summary of: The Competition Kinetics of Unbranched Chain Processes of Free-Radical Addition to Double Bonds of Molecules with the Formation of 1:1 Adducts, International Journal of Polymeric Materials, July 2000, Taylor & Francis,
DOI: 10.1080/00914030008033886.
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