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The composite materials based on a thermosetting binder mark SFP and thermally expanded graphite and containing 50–70% of the filler are prepared by the method of hot pressing. It is studied how the physicochemical and mechanical characteristics of the composite depend on the method of filler introduction. The materials prepared by mixing air-dry components are shown to exhibit the high conductivity (up to 195 S/cm) and strength (above 25 mPa), the low interface contact resistance (less than 10 mΩ cm2), and the corrosion current not exceeding 1 µA/cm2, which allows the high efficiency of energy conversion in SPFC to be reached. [ABSTRACT FROM AUTHOR]

An universal catalytic system 4-acetamido-2,2,6,6-tetramethylpiperidine-1-oxyl/KI/pyridine base for the conversion of alcohols into carbonyl compounds and derivatives of carboxylic acids is developed. The use of pyridine, 2,6-lutidine or collidine made it possible to obtain carbonyl compounds (in yield up to 100%) after passing a charge of 2–2.2 F. In the presence of pyridine, aliphatic alcohols are converted to esters (in yield up to 35%) after passing 4 F. Acid anhydrides (in yield up to 80%) are formed using 2,6-lutidine or collidine after passing 5–6 F. Nitriles were obtained (in yield up to 99%) in the presence of 2,6‑lutidine and a source of nitrogen after passing 4–4.5 F. [ABSTRACT FROM AUTHOR]

The possibilities of fabrication and properties of new furan-containing polymers based on 5-hydroxymethylfurfural (5-HMF) and nitrogen-containing co-monomers (urea and melamine) have been studied. Two series of polymers, namely, 5-HMF-melamine and 5-HMF-urea at different ratios of the furan component: melamine (urea) were obtained. The effect of temperature in the range of 80–180 °C on the degree of cross-linking of polymers was studied. The thermostability of polymers was investigated by the TGA method. The polymers were tested for fire resistance according to GOST 28157-89 standard. It is demonstrated that obtained materials show increased heat and fire resistance in comparison to similar urea- and melamine-formaldehyde resins. It is recommended to use the developed polymers as non-combustible heat-insulating materials. [ABSTRACT FROM AUTHOR]