STUDY OF STRUCTURAL ASPECTS OF THERMOCHEMICAL CONVERSIONS OF COMPOUNDS MODELING OLIGOPHENYLENES CONTAINING ACENAPHTHYLENYL AND ACENAPHTHENYL GROUPS

With the aim of elucidating the mechanism of the thermochemical conver sion of oligophenylenes containing acenaphthylenyl groups, the thermol ysis of model compounds: 1,3,5-tris(5-acenaphthylenyl)benzene (1), 1,3 ,5-tris(5-acenaphthenyl)benzene (2), acenaphthylene, and acenaphthene, was studied by differential thermal analysis (DTA), dynamic thermogra vimetric analysis (TGA), and mass spectrometry. Compounds 1 and 2 were studied by X-ray structural analysis. A scheme for the formation of s econdary structures was suggested. Optimum temperature conditions were found for preparing thermostable, heat-resistant, and stable to therm ooxidation polymers based on compounds containing the acenaphthylenyl groups.