期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 128, 期 6, 页码 3540-3547出版社
WILEY
DOI: 10.1002/app.38564
关键词
polyelectrolytes; addition polymerization; batteries and fuel cells; functionalization of polymers; membranes
资金
- National Natural Science Foundation of China [21164006]
Novel sulfonated poly(2-butoxymethylenenorbornene-co-2-(6-phenoxy-hexyloxymethylene)-5-norbornene [sP(BN/PhHN)] were prepared successfully through vinyl-addition type polymerization and then sulfonated with concentrated sulfuric acid (98%) as sulfonating agent in a component solvent. The sP(BN/PhHN)-40 with the maximal degree of sulfonation of 40% can be obtained by controlling the sulfonating reaction time from 8 to 20 h, and a proton conductivity of 3.35 x 103 S/cm was achieved at 70 degrees C. The methanol permeabilities of these membranes were in the range from 0.26 to 6.58 x 107 cm2/s, which were remarkably lower than Nafion (2.36 x 106 cm2/s). TEM analysis revealed that these side-chain type membranes have a microphase separated structure composed of hydrophilic side-chain domains and hydrophobic polynorbornene main chain domains. Sulfonated polynorbornene containing soft spacers displayed better properties, such as lower water uptake, high thermal properties, mechanical properties, and low methanol permeability. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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