SULFONATED POLY(ARYLENE ETHER BENZIMIDAZOLE) COPOLYMER MEMBRANE SYNTHESIS AND CHARACTERIZATION

Year 2014, Volume: 15 Issue: 2, 137 - 146, 05.05.2015

Çağla Tosun , Özgül Gerçel , Emre Uraz Hasan Gerçel

https://doi.org/10.18038/btd-a.50020

Abstract

Fuel cells which are utilized to produce electrical energy from hydrogen are accepted as an alternative of environmentally friendly and efficient energy production. Perflorosulfonic acid based membranes such as Nafion, are used frequently in polymer electrolyte membrane fuel cells (PEMFCs). However researches on alternative polymer electrolyte membranes (PEMs) are continued because of decrement in proton conductivity at high temperatures and high prices of Nafion membranes. At the first stage of this study, disodium-3,3'-disulfonate-4,4'-dichlorodiphenylsulfone (S-DCDPS) and benzimidazole bisphenol (HPBI) monomers were synthesized. Then a sulfonated poly(arylene ether benzimidazole) copolymer was synthesized via nucleophilic aromatic polycondensation reaction of synthesized monomers. 1H NMR and FTIR analysis of synthesized monomers and 1H NMR, FTIR and thermogravimetric analysis (TGA) of the copolymer were performed. Copolymer synthesis was confirmed clearly by the results of the analysis. TGA curve showed that synthesized copolymer has a high thermal stability (~400 oC) and can be used for high temperature applications

Keywords

Poly(arylene ether), Polybenzimidazole, Copolymer, High temperature polymers, Films

SULFONATED POLY(ARYLENE ETHER BENZIMIDAZOLE) COPOLYMER MEMBRANE SYNTHESIS AND CHARACTERIZATION

Abstract

Hidrojenden elektrik enerjisi üretiminde kullanılan yakıt hücreleri, geleceğin çevre dostu ve yüksek verimli enerji üretimine alternatif olarak kabul görmektedirler. Nafion gibi perflorosülfonik asit bazlı membranlar polimer elektrolit membran yakıt hücreleri (PEMHY)’nde sıklıkla kullanılmaktadırlar. Ancak Nafion membranların yüksek sıcaklıklarda proton iletkenliklerinin düşmesi ve fiyatlarının yüksek olması nedeniyle alternatif polimer elektrolit membran (PEM)’lar üzerine araştırmalar devam etmektedir. Bu çalışmanın ilk aşamasında, disodyum-3,3’-disülfonat-4,4’-diklorodifenilsülfon (SDCDPS) ve benzimidazol bisfenol (HPBI) monomerlerinin sentezi gerçekleştirilmiştir. Daha sonra sentezlenen monomerlerden nükleofilik aromatik polikondenzasyon reaksiyonu ile poli(arilen eter benzimidazol) kopolimeri sentezlenmiştir. Sentezlenen monomerlerin 1H NMR ve FTIR, kopolimerin ise 1H NMR, FTIR ve termogravimetrik analizleri (TGA) gerçekleştirilmiştir. Yapılan analizler sonucunda kopolimerin sentezlendiği açıkça ortaya konulmuştur. TGA eğrisi sentezlenen kopolimerin ısıl kararlılığının yüksek olduğunu (~400 oC) ve yüksek sıcaklık uygulamalarında kullanılabilirliğini göstermiştir

Keywords

Poli(arilen eter), Polibenzimidazol, Kopolimer, Yüksek sıcaklık polimerleri, Filmler

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