dc.contributor.author | Deligoz, Huseyin | |
dc.contributor.author | Oksuzomer, Faruk | |
dc.contributor.author | Vatansever, Sibel | |
dc.contributor.author | Ozgumus, Saadet | |
dc.contributor.author | Koc, S. Naci | |
dc.contributor.author | Gurkaynak, M. Ali | |
dc.date.accessioned | 2021-03-03T13:14:09Z | |
dc.date.available | 2021-03-03T13:14:09Z | |
dc.date.issued | 2008 | |
dc.identifier.citation | Deligoz H., Vatansever S., Oksuzomer F., Koc S. N. , Ozgumus S., Gurkaynak M. A. , "Synthesis and characterization of sulfonated homo- and co-polyimides based on 2,4 and 2,5-diaminobenzenesulfonic acid for proton exchange membranes", POLYMERS FOR ADVANCED TECHNOLOGIES, cilt.19, sa.12, ss.1792-1802, 2008 | |
dc.identifier.issn | 1042-7147 | |
dc.identifier.other | av_32cc7a55-150e-4420-8c5a-0a80d2c5ae01 | |
dc.identifier.other | vv_1032021 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12627/38453 | |
dc.identifier.uri | https://doi.org/10.1002/pat.1196 | |
dc.description.abstract | A series of sulfonated homo- and random co-polyimides (co-SPI) based on 2,4-diaminobenzene-sulfonic acid (2,4-DABS) and 2,5-diaminobenzenesulfonic acid (2,5-DABS) has been synthesized via conventional two-step polyimidization method. 2,4-DABS and 2,5-DABS were used as sulfonated diamine compounds, 4,4'-oxydianiline (ODA) and 4,4'-diaminodiphenyl sulfone (DDS) were used as non-sulfonated diamine compounds. Mixtures of sulfonated and non-sulfonated diamine compounds were reacted with benzophenonetetracarboxylic dianhydride (BTDA) to obtain co-SPI membranes. Molar ratios of sulfonated to non-sulfonated diamine were systematically varied to produce copolymers of controlled compositions. The co-SPIs were evaluated for thermal oxidative stability, ion exchange capacity (IEC), water uptake, proton conductivity, solubility, and hydrolytic stability. Proton conductivity and hydrolytic stability of the co-SPIs were compared with the fully aromatic polyimide, homo-SPIs (BTDA/2,4-DABS and BTDA/2,5-DABS). Regarding thermogravimetric analysis (TGA) analysis, it is concluded that desulfonation temperature in the range of 200-350 degrees C suggests high stability of sulfonic acid groups. co-SPIs with 40 mol% of 2,4-DABS showed similar or higher proton conductivity than Nafion (R) 117 in water. Proton conductivity values of the co-SPIs were mainly a function of IEC and water uptake. Consequently, the optimum concentration of 2,4-DABS was found to be in the range of 30-40 mol% from the viewpoint of proton conductivity, IEC, and hydrolytic stability. Copyright (C) 2008 John Wiley & Sons, Ltd. | |
dc.language.iso | eng | |
dc.subject | Fizikokimya | |
dc.subject | POLİMER BİLİMİ | |
dc.subject | Temel Bilimler (SCI) | |
dc.subject | Kimya | |
dc.subject | Temel Bilimler | |
dc.subject | Polimer Karakterizasyonu | |
dc.title | Synthesis and characterization of sulfonated homo- and co-polyimides based on 2,4 and 2,5-diaminobenzenesulfonic acid for proton exchange membranes | |
dc.type | Makale | |
dc.relation.journal | POLYMERS FOR ADVANCED TECHNOLOGIES | |
dc.contributor.department | İstanbul Üniversitesi , , | |
dc.identifier.volume | 19 | |
dc.identifier.issue | 12 | |
dc.identifier.startpage | 1792 | |
dc.identifier.endpage | 1802 | |
dc.contributor.firstauthorID | 7540 | |