Abstract
Novel copolynorbornenes bearing pendant sultone groups (designated as P(BN/SulNBOH) and P(BN/SulNBOMe)) have been successfully synthesized via copolymerization of functionalized norbornenes bearing sultones (designated as SulNBOH and SulNBOMe) with 2-butoxymethylene norbornene (BN). The catalyst system showed high catalyst activity (104 gpolymer/molNi·h) and the obtained copolymers have high molecular weight and a narrow molecular weight distribution. Furthermore, the achieved copolymers P(BN/SulNBOH) and P(BN/SulNBOMe) were converted into sulfonated copolymers sP(BN/NBOH) and sP(BN/NBOMe). Both sP(BN/NBOH) and sP(BN/NBOMe) membranes displayed low water uptake, high thermal properties, good mechanical properties, and better proton exchange membranes properties. The proton conductivities measured in the hydrated state at 80 °C ranged from 10−5 to 7.19 × 10−3 S·cm−1.
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Novel copolynorbornenes bearing pendant sultone groups are synthesized. The achieved copolymers are converted into the sulfonated copolymers. The proton conductivities of the membranes measured in the hydrated state at 80 °C ranged from 10−5 to 7.19 × 10-3 S·cm−1.
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This work was supported by the National Natural Science Foundation of China (21164006).
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Hu, M., He, X., Chen, Y. et al. Sulfonated copoly(norbornene)s bearing sultone pendant groups and application as proton exchange membranes candidates. J Polym Res 19, 9977 (2012). https://doi.org/10.1007/s10965-012-9977-3
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DOI: https://doi.org/10.1007/s10965-012-9977-3