“The interaction of H3PO4 and steam with PBI and TPS polymeric membranes. A TGA and Raman study”
M.K. Daletou, M. Geormezi, E. Vogli, G.A. Voyiatzis, S.G. Neophytides, Journal of Materials Chemistry A, 2(4) (2014) 1117-1127.
http://pubs.rsc.org/en/content/articlelanding/2014/ta/c3ta13335d#!divAbstract