However, in order to reach this goal first it must be understood how physical and chemical properties of S/DIB copolymers involving short and long sulfur chains are different. For example, vibrational spectroscopic signatures of "local" DIB-S n -DIB structures and their contribution to the total spectra of S/DIB copolymer are not yet known. Moreover, up to now any estimation on the sulfur chain length distribution in S/DIB systems have been based on the sulfur (or DIB) mass fraction used in the synthesis process. Therefore, a question which remains to be answered is whether it is possible to experimentally distinguish between short and long sulfur chains in sulfur/carbon copolymers.