Characterization studies catalysts blend

Polymer chemists use DSC extensively to study percent crystallinity, crystallization rate, polymerization reaction kinetics, polymer degradation, and the effect of composition on the glass transition temperature, heat capacity determinations, and characterization of polymer blends. Materials scientists, physical chemists, and analytical chemists use DSC to study corrosion, oxidation, reduction, phase changes, catalysts, surface reactions, chemical adsorption and desorption (chemisorption), physical adsorption and desorption (physisorp-tion), fundamental physical properties such as enthalpy, boiling point, and equdibrium vapor pressure. DSC instruments permit the purge gas to be changed automatically, so sample interactions with reactive gas atmospheres can be studied. 

Analysis of the feedstocks, shown in Table 2, indicates that the density, refractive index and carbon content of the blend naphtha are higher than those of SRN. This was due to higher aromatics and naphthenes, lower alkanes and higher final boiling point. To study the effect of catalyst type on sulfitr compounds selectivity, the feedstock and products were characterized... 

ToF-SlMS is mainly referenced in the characterization of polymers and organic additives and blends [19-26] only few investigations of catalysts are reported in the litterature [27-29]. However, inorganic applications of ToF-SIMS were illustrated by Aubriet et al. [30] who studied the behaviour of the first row transition metal oxides and proposed, for each of them, a reliable methodology of speciation. 

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