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Isothermal oven exposure tests using cylindrical and cubic sample holders are conducted in air on a 14% (w/w) K 2 CO 3 -impregnated activated carbon at temperatures between 115 and 200 o C. Such oven tests are widely performed on potentially self-heating materials in agreement with IATA regulations concerning the transportation of dangerous goods. The thermal behavior of this...
Here we report our recent progresses in the synthesis and the study of fullerene-containing macromolecules. For example, poly(aryl ether) dendritic branches terminated with peripheral triethyleneglycol chains have been attached to C 60 . Their photophysical properties have been systematically investigated in three solvents, namely toluene, dichloromethane, and acetonitrile. The changes...
Using a conventional laboratory diffractometer, small angle X-ray scattering (SAXS) was used to determine the average platinum particle size in samples of carbon with a range of platinum loadings. The results obtained were compared with those obtained from wide-angle X-ray diffraction (WAXS) studies. SAXS was more effective than WAXS for determining the average platinum particle size in samples where...
The effect of moisture on the kinetics of the reaction of K 2 CO 3 -impregnated carbons with air at elevated temperature has been studied. Differential scanning calorimetry (DSC) measurements, isothermal DSC measurements and oven exposure tests all show that the reaction of the impregnated carbons with air is accelerated by the presence of moisture adsorbed by the impregnated carbon...
Isothermal DSC measurements are used to extract the kinetics of the reaction between activated carbon, which has been impregnated with K 2 CO 3 , and air at elevated temperature. For the carbon studied here, the reaction takes place in two apparently independent processes. In the first process, the surface functional groups react with the carbon and with air, and in the second process...
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