“…For a more detailed study of the processes going on with heat treatment of OAs in air and under inert conditions in the 20-800°C temperature range, fractions of polyanthracene (PA) were selected, and also fractions of the product of co-polycondensation of anthracene and benzene (PAB), with similar values for the degree of branching, according to IR-spectrum data (ref. 10).…”