The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A comparative theoretical study was performed to explore the effect of polymer backbone on the proton exchange in different sulfonated membranes such as poly(phenylene oxide), poly(benzimidazole), polyimide, poly(oxadiazole) and Nafion 117 at low hydration state. Geometry optimization of the membranes in the presence of different numbers of water molecules (1–3 water molecules) revealed that proton...
Nowadays, designing new proton exchange membranes that will allow fuel cell operation without extensive humidification requirement is a major challenge for polymer chemists. Efforts are made to study sulfonated and phosphonated poly(oxadiazole) (with higher hydrothermal stability) behaviors in the presence of other protogenic groups such as phenolic, amidic, and carboxylic groups. In this study, density...
Two phenol-containing sulfonated polyoxadiazoles (SPOD) membranes were synthesized at high temperature and short reaction time through one-step method. The structure of polymers was characterized by various techniques. Ion exchange capacity, sulfonation degree and water-uptake of SPODs were also investigated. Polyoxadiazole based on 5-hydroxyisophthalic acid (5HIP) was insoluble in organic solvents;...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.