Mass transport properties were investigated by means of the chronoamperometry method for a series of sulfonated poly~arylene ether sulfone! ~SPES! membranes and sulfonated polysulfide sulfone ~SPSS! polymers of various ion exchange capacities ~IEC! at a Pt ~microelectrode!/proton exchange membrane ~PEM! interface. The temperature and pressure dependence of oxygen transport parameters show simil...

Sulfonated carbonaceous material useful as a solid acid catalyst was prepared from lignosulfonate, a waste of the paper-making industry sulfite pulping process, and characterized by 13C-NMR, FT-IR, TGA, SEM and elemental analysis, etc. The sulfonic acid group density and total density of all acid groups in the sulfonated carbonaceous material was determined by titration to be 1.24 mmol/g and 5....

Various polybenzimidazole (PBI)-based ion-exchange films were prepared and thoroughly characterized by Fourier transform infrared (FT-IR) spectroscopy, proton conductivity, and water uptake for possible use as fuel cell membranes. Upon the increase in the flexibility of the PBI-based polymer films (e.g., poly(oxyphenylene benzimidazole) (OPBI) and sulfonated OPBI (s-OPBI)), the membranes exhibi...

Sulfonated reactive azo dyes, such as Reactive Orange 107, are extensively used in textile industries. Conventional wastewater treatment systems are incapable of degrading and decolorizing reactive azo dyes completely from effluents, because of their stability and resistance to aerobic biodegradation. However, reactive azo dyes are degradable under anaerobic conditions by releasing toxic aromat...

Plain reservoirs in arid areas usually have a shallow water depth, a large surface area, and severe evaporative water-loss. To lessen the water loss, a polystyrene board coverage technique was used. This paper represents a demonstrative application study of the polystyrene board coverage technique in the Daquangou Plain Reservoir in the city of Shihezi, Xinjiang. Six different polystyrene board...

The formation of membranes from two systems has been studied. In the system polyurethanedimethylformamide-water, the mechanism for the formation of the sponge-like structure proves to be a liquid-liquid phase separation with nucleation and growth of the diluted phase. This mechanism has been confirmed for the system modified polystyrene-polyisoprene-polystyrene/ o-dichlorobenzene/(methanol-wate...

The sulfonated polyphenylene ionomer, SPP-QP, being used as the anode binder, improves durability of polymer electrolyte fuel cells in gas exchange cycle test simulating start-up conditions.

A series of polystyrene hybrid nanocomposites have been fabricated with varying amounts of TiO2 viz., 0, 0.5 and 1 % w/w along with 3% TS by in-situ polymerization method. The influence of surface modified TiO2 nanoparticles on the thermal properties of PS matrix was examined using thermogravimetry and differential scanning calorimetry. Thermal characteristics of the polystyrene/TS/TiO2 hybrid ...