Synthesis of crosslinked polystyrene-b-poly(hydroxyethyl methacrylate)-b-poly(styrene sulfonic acid) triblock copolymer for electrolyte membranes
Macromolecular Research, ISSN: 1598-5032, Vol: 17, Issue: 5, Page: 325-331
2009
- 15Citations
- 17Captures
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Article Description
The synthesis and the characterization of crosslinked ABC triblock copolymer, i.e. polystyrene-b-poly (hydroxyethyl methacrylate)-b-poly(styrene sulfonic acid), (PS-b-PHEMA-b-PSSA) is reported. PS-b-PHEMA-b-PSSA triblock copolymer at 20:10:70 wt% was sequentially synthesized via atom transfer radical polymerization (ATRP). The middle block was crosslinked by sulfosuccinic acid (SA) via the esterification reaction between -OH of PHEMA and -COOH of SA, as demonstrated by FTIR spectroscopy. As increasing amounts of SA, ion exchange capacity (IEC) continuously increased from 2.13 to 2.82 meq/g but water uptake decreased from 181.8 to 82.7%, resulting from the competitive effect between crosslinked structure and the increasing concentration of sulfonic acid group. A maximum proton conductivity of crosslinked triblock copolymer membrane at room temperature reached up to 0.198 S/cm at 3.8 w% of SA, which was more than two-fold higher than that of Nation 117(0.08 S/cm). Transmission electron microscopy (TEM) analysis clearly showed that the PS-b-PHEMA-b-PSSA triblock copolymer is microphase-separated with a nanometer range and well developed to provide the connectivity of ionic PSSA domains. The membranes exhibited the good thermal properties up to 250 °C presumably resulting from the microphase-separated and crosslinked structure of the membranes, as revealed by thermal gravimetric analysis (TGA). © 2009 by the Polymer Society of Korea.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=67949098685&origin=inward; http://dx.doi.org/10.1007/bf03218870; http://link.springer.com/10.1007/BF03218870; http://link.springer.com/content/pdf/10.1007/BF03218870; http://link.springer.com/content/pdf/10.1007/BF03218870.pdf; http://link.springer.com/article/10.1007/BF03218870/fulltext.html; http://www.springerlink.com/index/pdf/10.1007/BF03218870; http://www.springerlink.com/index/10.1007/BF03218870; https://dx.doi.org/10.1007/bf03218870; https://link.springer.com/article/10.1007/BF03218870
Springer Science and Business Media LLC
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