Abstract
Reduced radial distribution functions (RDFs) for non-crystalline solutions of poly( p-phenylene-1,3,4-oxadiazole) (POD) in H 2SO 4 have been determined and discussed for the first time. In solutions of up to 14 wt% POD in H 2SO 4 the POD monomeric units act as simple perturbations of the correlation lattice of the pure solvent. Between 14 and 15 wt% POD content a phase transition from isotropic solution to crystal solvates and H 2SO 4 occurs. The short range interactions of POD molecules with the correlation lattice of a 96.2 wt% aqueous H 2SO 4 solvent are considerably stronger than for the same POD content in a 100% H 2SO 4 solvent.
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