Radiation-induced crosslinking of poly(styrene-butadiene-styrene) block copolymers and their sulfonation
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- 作者：Sun-Young Lee ; Ju-Myung Song ; Joon-Yong Sohn ; Yong-Gun Shul ; Junhwa Shin
- 关键词：Radiation ; Crosslinking ; SBS ; Block copolymer ; Sulfonation
- 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
- 出版年：1 December, 2013
- 年：2013
- 卷：316
- 期：Complete
- 页码：71-75
- 全文大小：956 K
文摘
Several crosslinked poly(styrene-butadiene-styrene) (c-SBS) block copolymer films were prepared using a gamma ray or electron beam with various irradiation doses and the prepared c-SBS film was then subjected to sulfonation using a chlorosulfonic acid (CSA) solution to introduce a sulfonic acid group. To estimate the degree of crosslinking, the gel fractions and FT-IR spectra of the c-SBS films were used and the results indicate that the degree of crosslinking is increased with an increase in the radiation dose. The surface morphology and mechanical property of the c-SBS films were observed using SEM and UTM instruments, respectively. The sulfonated c-SBS films were investigated by measuring the ion exchange capacity (IEC) and by observing the cross-sectional distribution patterns of sulfonic acid group using an SEM-EDX instrument. The IEC and SEM-EDX studies indicate that the sulfonated c-SBS membranes can be successfully prepared through the radiation crosslinking of the SBS film and the subsequent sulfonation with a diluted CSA solution.