By changing pendant groups of polyphosphazene, poly[bis(phenoxy)phosphazene] (PBPP) were synthesized, characterized and investigated in model gasoline desulfurization experiments via pervaporation. Compared with poly[bis(trifluoroethoxy)phosphazene] (PTFEP), PBPP was substantially improved in pervaporation performance, thermal stability and swelling stability. The possibility of PBPP composite membrane for industrial experiments was also investigated. PBPP showed high toughness, long time durability and effective desulfurization property in laboratory scale experiments and based on the obtained results, PBPP was firmly believed to be a promising pervaporative membrane material for pervaporation desulfurization of gasoline in industrial experiments.
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Yang et al. (2012) studied this question.
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