On the chemical composition of Thermally Treated coal-Tar Pitches

摘要

The aim of this work is to study the changes in the chemical composition of a commercial impregnating coal-tar pitch due to the thermal treatment, using whole samples and the corresponding single isotropic phases and mesophases separated by hot filtration. A deeper knowledge of the molecular size and structure of the components present in the samples was achieved by means of size exclusion chromatography (SEC), plantar chromatrography (PC), UV- fluorescence (UV-F), solid and solution-state 13_C NMR and MALDI-mass spectrometry.