| 학회 |
한국화학공학회 |
| 학술대회 |
2009년 봄 (04/23 ~ 04/24, 광주 김대중컨벤션센터) |
| 권호 |
15권 1호, p.20 |
| 발표분야 |
고분자 |
| 제목 |
Proton Conducting Crosslinked Polymer Electrolyte Membranes Based On SBS Block Copolymer |
| 초록 |
A series of crosslinked polymer electrolyte membranes with controlled structures were prepared based on poly(styrene-b-butadiene-b-styrene) (SBS) triblock copolymer and a sulfonated monomer, i.e. 2-sulfoethyl methacrylate (SEMA). SBS membranes were thermally crosslinked with SEMA in the presence of a thermal-initiator, i.e. 4,4’-azobis(4-cyanovaleric acid) (ACVA), as confirmed by FT-IR spectroscopy. The water uptake and the ion exchange capacity (IEC) of membranes increased almost linearly with SEMA concentrations due to the increase of SO3- groups. However, the proton conductivity of membranes increased linearly up to 33wt% of SEMA, above which it abruptly jumped up to reach 0.04 S/cm presumably due to the formation of well-developed proton channels. Microphase-separated morphology and amorphous structures of crosslinked SBS/SEMA membranes were observed using wide angle x-ray scattering (WAXS) and transmission electron microscope (TEM). The membranes exhibited good mechanical properties and high thermal stability up to 250 oC, as determined by a universal testing machine (UTM) and thermal gravimetric analysis (TGA), respectively. |
| 저자 |
노동규1, 증효뢰2, 서진아1, 박정태2, 김종학1
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| 소속 |
1연세대 화공생명공학, 2수소연료전지 특성화 사업단 |
| 키워드 |
SBS; block copolymer; proton conductivity; crosslinked; polymer electrolyte membrane
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| 원문파일 |
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