Thermal Degradation of Polystyrene-Polydimethylsiloxane Blends

Specific features of thermal degradation of polystyrene-polydimethylsiloxane blends were studied, and the effect of the organosilicon polymeric additive, polydimethylsiloxane, on the heat resistance of polystyrene was examined. The thermal degradation products were analyzed by gas chromatography-mass spectrometry. A mechanism of the joint pyrolysis was suggested.     

Specific Features of Thermal Degradation of Polypropylene in the Presence of Magnesium Hydroxide

Specific features of thermal oxidative degradation of polypropylene and its composite with Mg(OH)₂ were studied by pyrolytic gas chromatography-mass spectrometry and thermal gravimetric analysis.     

Kinetics of the aza-Michael Reaction at Room Temperature

The rates of the aza-Michael reaction at room temperature were measured for some amines and alkenes. When the reaction mixture was diluted with methanol, the reaction was accelerated. The acceleration with methanol was especially strong for acrylonitrile. In the latter case, the reaction rate constant can increase by almost three decimal orders. The bulky substituent in the alpha position of methacrylates had little effect on the reaction rate, while the bulky substituent in the ester group significantly slowed the aza-Michael reaction.     

Transformations of Ethanol Supercritical Fluid

Russian Journal of Organic Chemistry - Nowadays, a new approach to the synthesis of glycerol-free biodiesel is being developed in the framework of sub- and supercritical fluid (SCF) technologies,...