Formation of the chain microstructure in the synthesis of adamantane-containing copolyimides in molten benzoic acid
High-resolution 13C NMR spectroscopy was applied to study the chain microstructure of copolyimides obtained at 140 °C by one-pot high-temperature polycondensation in molten benzoic acid from 2,2-propylidene-bis(4-phenylene-4-oxyphthalic acid) d