Maleation of Dokozan (Polyethylene Model) in the Presence of Dibenzoyl Peroxide And Nitroxyl Radical TEMPO
The model systems maleic anhydride (MA)/TEMPO, dibenzoyl peroxide (PB)/TEMPO, MA/PB/TEMPO, which are used in the processes of obtaining functionalized (maleated) polyethylene (MPE), have been studied for the first time. MPE can more easily degrade in the environment under the action of enzymes of soil bacteria, air oxygen, etc. By the methods of 1H and 13C NMR spectroscopy it was shown, that the TEMPO radical forms a low-melting π-complex with MA, and reactions with PB partially lead to wastage of reagents. With the use of docosane (DC) as a PE model, reactions of DC functionalization were carried out in the MA/PB, MA/TEMPO and MA/PB/TEMRO systems. It was shown that the MA/PB/TEMPO system is the optimal system for DC reactions at 100 оC, and MA/PB at 160 оC. The functionalized DC contains units of succinic anhydride (SA) (or succinic acid after SA hydrolysis) and a minor amount of MA residues (or maleic acid after MA hydrolysis).