The buildup kinetics for the products of noninhibited oxidation of hexadecane at 150-170degreesC in reactors of various types and the effect of these products on the process were studied. It was shown that the high-temperature oxidation of hydrocarbon is accompanied by significant heat evolution. As a result, polyhydroperoxides and polyfunctional compounds containing hydroperoxide groups are quickly formed in the system. The induced decomposition of these molecules and their associates, even in the early stages of oxidation, can lead to the formation of crosslinked functionalized high-molecular-mass compounds, the analogues of reversed micelles.