Synthesis and characterization of highly fluorinated sulfonated polytriazoles for proton exchange membrane application

Singh A, Banerjee S, Komber H, Voit B (2016)

Publication Type: Journal article

Publication year: 2016

Journal

RSC Advances Royal Society of Chemistry

Book Volume: 6

Pages Range: 12478-13489

Journal Issue: 16

DOI: 10.1039/c5ra26821d

Abstract

A series of polytriazole copolymers (PTFQSH-XX) were synthesized by the click polymerization of 1,1,1,3,3,3-hexafluoro-2,2-bis(4-(prop-2-ynyloxy)phenyl)propane (TF) with a mixture of two diazide monomers: 4,4-bis[3-trifluoromethyl-4(4-azidophenoxy)phenyl]biphenyl (QAZ) and 4,4′-diazido-2,2′-stilbene disulfonic acid disodium salt ("S"). The degree of sulfonation (DS) of the copolymers was controlled by adjusting the mole ratio of "S" to the non-sulfonated diazide (QAZ). The polytriazole copolymers were characterized by FTIR and NMR (¹H, ¹³C and ¹⁹F) spectroscopy. The PTFQS-XX membranes were prepared by dissolving the salt form of the copolymers in dimethyl formamide. The physical properties and proton conductivity of the membranes were investigated. The presence of hexafluoroisopropylidene groups in the copolymers contributed to high thermal and oxidative stability and low swelling of the membranes. TEM micrographs of the polytriazole membranes showed a good phase separated morphology with ionic clusters in the range of 3-75 nm. The proton conductivities of the fluorinated membranes were found in the range of 27-136 mS cm^-1 at 80 °C in water.

Involved external institutions

Indian Institute of Technology Bombay

India (IN) Leibniz-Institut für Polymerforschung Dresden e. V.

Germany (DE)

How to cite

APA:

Singh, A., Banerjee, S., Komber, H., & Voit, B. (2016). Synthesis and characterization of highly fluorinated sulfonated polytriazoles for proton exchange membrane application. RSC Advances, 6(16), 12478-13489. https://doi.org/10.1039/c5ra26821d

MLA:

Singh, Asheesh, et al. "Synthesis and characterization of highly fluorinated sulfonated polytriazoles for proton exchange membrane application." RSC Advances 6.16 (2016): 12478-13489.

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