Highly phenylated polyarylenes: Synthesis, properties, and applications

Rusanov, A. L.; Likhachev, D. Yu.; Kostoglodov, Petr V.; Belomoina, N. M.

doi:10.1134/s1811238208010037

Cited by 7 publications

(3 citation statements)

References 47 publications

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“…Maximum values of 222 mS cm −1 and 268 mS cm −1 were observed at 95 % RH for sPPN‐H + at 30 °C and 80 °C, respectively. These values are significantly higher than previously reported sulfonated polyphenylenes and the 79 mS cm −1 (30 °C) and 113 mS cm −1 (80 °C) values obtained for Nafion NR‐211 under identical conditions. sPPB‐H + exhibits proton conductivities of 129 mS cm −1 and 172 mS cm −1 at 30 °C and 80 °C respectively, likewise larger than previously reported sPPP‐H + and NR‐211.…”

Section: Methodscontrasting

confidence: 64%

“…Proton conductivity measurements were performed using electrochemical impedance spectroscopy (EIS) under relative humidities (RH) ranging from 30 %to95%,atboth 30 8 8Cand 80 8 8C ( Figure 1). Maximum values of 222 mS cm À1 and 268 mS cm À1 were observed at 95 %R Hf or sPPN-H + at 30 8 8Ca nd 80 8 8C, respectively.T hese values are significantly higher than previously reported sulfonated polyphenylenes [20,24,[30][31][32] and the 79 mS cm À1 (30 8 8C) and 113 mS cm À1 (80 8 8C) values obtained for Nafion NR-211 under identical conditions. sPPB-H + exhibits proton conductivities of 129 mS cm À1 and 172 mS cm À1 at 30 8 8Cand 80 8 8Crespectively, likewise larger than previously reported sPPP-H + and NR- 211.…”

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confidence: 52%

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Highly Stable, Low Gas Crossover, Proton‐Conducting Phenylated Polyphenylenes

et al. 2017

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Two classes of novel sulfonated phenylated polyphenylene ionomers are investigated as polyaromatic-based proton exchange membranes. Both types of ionomer possess high ion exchange capacities yet are insoluble in water at elevated temperatures. They exhibit high proton conductivity under both fully hydrated conditions and reduced relative humidity, and are markedly resilient to free radical attack. Fuel cells constructed with membrane-electrode assemblies containing each ionomer membrane yield high in situ proton conductivity and peak power densities that are greater than obtained using Nafion reference membranes. In situ chemical stability accelerated stress tests reveal that this class of the polyaromatic membranes allow significantly lower gas crossover and lower rates of degradation than Nafion benchmark systems. These results point to a promising future for molecularly designed sulfonated phenylated polyphenylenes as proton-conducting media in electrochemical technologies.

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Section: Methodscontrasting

confidence: 64%

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confidence: 52%

Highly Stable, Low Gas Crossover, Proton‐Conducting Phenylated Polyphenylenes

et al. 2017

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“…The formation of a nanoporous structure in the case of supercritical СО 2 , along with introduc tion of fluorinated fragments, contributes to the cre ation of materials with very low dielectric constants (1.58-1.97) [148][149][150]. The Diels-Alder cycloaddi tion is one of the methods of obtaining these polymers [151]. This method is employed for the synthesis of both initial monomers and polymers [145,152].…”

Section: Carbochain Condensation Polymersmentioning

confidence: 99%

Achievements in polycondensation and condensation polymers

Sapozhnikov

Vygodskii

2015

Polym. Sci. Ser. B

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Highly Stable, Low Gas Crossover, Proton‐Conducting Phenylated Polyphenylenes

et al. 2017

View full text Add to dashboard Cite

Two classes of novel sulfonated phenylated polyphenylene ionomers are investigated as polyaromatic‐based proton exchange membranes. Both types of ionomer possess high ion exchange capacities yet are insoluble in water at elevated temperatures. They exhibit high proton conductivity under both fully hydrated conditions and reduced relative humidity, and are markedly resilient to free radical attack. Fuel cells constructed with membrane‐electrode assemblies containing each ionomer membrane yield high in situ proton conductivity and peak power densities that are greater than obtained using Nafion reference membranes. In situ chemical stability accelerated stress tests reveal that this class of the polyaromatic membranes allow significantly lower gas crossover and lower rates of degradation than Nafion benchmark systems. These results point to a promising future for molecularly designed sulfonated phenylated polyphenylenes as proton‐conducting media in electrochemical technologies.

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Highly phenylated polyarylenes: Synthesis, properties, and applications

Cited by 7 publications

References 47 publications

Highly Stable, Low Gas Crossover, Proton‐Conducting Phenylated Polyphenylenes

Highly Stable, Low Gas Crossover, Proton‐Conducting Phenylated Polyphenylenes

Achievements in polycondensation and condensation polymers

Highly Stable, Low Gas Crossover, Proton‐Conducting Phenylated Polyphenylenes

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