A new series of composite materials (PLMTPA) based on tungstophosphoric acid (TPA) included in a polymeric matrix polyacrylamide (PLM), with TPA:PLM ratio 20/80, 40/60, and 60/40, were synthesized well characterized by FT-IR, XRD, 31P MAS-NMR, TGA-DSC, SEM-EDAX. Their acidic textural properties determined potentiometric titration nitrogen adsorption–desorption isotherms, respectively. Consideri...
