Proton Conductivity and Methanol Permeability of Sulfonated Syndiotactic Polystyrene Membranes

Autor:	Anna Borriello, Teresa Napolitano
Rok vydání:	2011
Předmět:	Materials science General Chemistry Conductivity Condensed Matter Physics Dielectric spectroscopy chemistry.chemical_compound Membrane chemistry Chemical engineering Permeability (electromagnetism) Elemental analysis Tacticity Polymer chemistry General Materials Science Methanol Polystyrene
Zdroj:	Soft Materials. 9:224-237
ISSN:	1539-4468 1539-445X
DOI:	10.1080/1539445x.2011.552382
Popis:	Proton conductivity of innovative ionomeric membranes based on partially sulfonated syndiotactic polystyrene (SsPS) was investigated. The membranes were prepared with various levels of sulfonation by chlorosulfonic reaction on sPS films, in its clathrate form, obtained by solution-casting. The actual sulfonation degree of sPS membranes was evaluated by elemental analysis and their proton conductivity was measured using a galvanostatic four-points-probe electrochemical impedance spectroscopy technique. The dependence of conductivity on the level of sulfonation, hydration condition, and temperature was studied. At higher sulfonation degrees, SsPS membranes showed the best performance in vapor phase at 100% RH. In particular, the best SsPS membrane with sulfonation degree about 26 mol% exhibited conductivity equal to 8.8 × 10−2 Ω−1 cm−1 at 31.5 °C. This property is stable during time and increases with temperature. For the membranes with the highest degree of sulfonation, we measured a methanol permeability ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fc3c15a9ab7fb4072b4cb240f610c6d7 https://doi.org/10.1080/1539445x.2011.552382 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.