The current research was aimed at preparing a series of novel copolymers suitable for fuel cell membranes via a two-step reaction. This will serve as pathway to overcome limitations associated with disulfonated PAES copolymers, including high proton conductivity at low relative humidity and decreased water solubility at high sulfonation levels, by combining unique properties of disulfonated PAES with those of HCCP. The introduction of HCCP into the PAES backbone will add additional reactive sites to allow post modification of the copolymer.Hybrid monomers were prepared by reacting 4-methoxyphenol (MOP) protected HCCP trimers with biphenol (BP), to create disubstituted BP based tetrachlorocyclotriphosphazene (BPTCCP) hybrid monomer. Successful monomer synthesis was confirmed using NMR based on the presence of the phenolic proton peak of BP. Subsequently, the hybrid monomer will be reacted with SDCDPS and DCDPS to yield a series of linear disulfonated BPTCCP-PAES-XX hybrid copolymers.    Figure1  Disulfonated BP Poly(arylene ether sulfone)-tetrachlorocyclotriphosphazene(BATCCP PAES-XX) Hybrid Copolymers.

Synthesis and characterization of biphenol based tetrachlorocyclotriphosphazene poly(arylene ether sulfone) hybrid copolymers for proton exchange membrane fuel cells

244th National Meeting (2012)

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