111 research outputs found

    Π˜Π·ΡƒΡ‡Π΅Π½ΠΈΠ΅ отвСрТдСния ΠΏΠΎΠ»ΠΈΡƒΡ€Π΅Ρ‚Π°Π½ΠΎΠ²Ρ‹Ρ… ΠΏΠΎΠΊΡ€Ρ‹Ρ‚ΠΈΠΉ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ ΠΈΠΊ-спСктроскопии

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    The results of the study of the curing process of polyurethane compositions with participation of two different catalysts by the method of IR spectroscopy are given. The time dependences of curing of polyurethane coatings from concentrations of catalysts were determined, on the basis of which the most effective catalyst was selected.ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½Ρ‹ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ исслСдования процСсса отвСрТдСния ΠΏΠΎΠ»ΠΈΡƒΡ€Π΅Ρ‚Π°Π½ΠΎΠ²Ρ‹Ρ… ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ†ΠΈΠΉ с участиСм Π΄Π²ΡƒΡ… Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Ρ… ΠΊΠ°Ρ‚Π°Π»ΠΈΠ·Π°Ρ‚ΠΎΡ€ΠΎΠ² ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ ИК-спСктроскопии. ΠžΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½Ρ‹ Π²Ρ€Π΅ΠΌΠ΅Π½Π½Ρ‹Π΅ зависимости отвСрТдСния ΠΏΠΎΠ»ΠΈΡƒΡ€Π΅Ρ‚Π°Π½ΠΎΠ²ΠΎΠ³ΠΎ покрытия ΠΎΡ‚ ΠΊΠΎΠ½Ρ†Π΅Π½Ρ‚Ρ€Π°Ρ†ΠΈΠΉ ΠΊΠ°Ρ‚Π°Π»ΠΈΠ·Π°Ρ‚ΠΎΡ€ΠΎΠ², ΠΏΠΎ ΠΊΠΎΡ‚ΠΎΡ€Ρ‹ΠΌ Π²Ρ‹Π±Ρ€Π°Π½ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ эффСктивный ΠΊΠ°Ρ‚Π°Π»ΠΈΠ·Π°Ρ‚ΠΎΡ€

    Π˜Π΄Π΅Π½Ρ‚ΠΈΡ„ΠΈΠΊΠ°Ρ†ΠΈΡ ΠΌΠΎΠ½ΠΎΠΌΠ΅Ρ€Π½ΠΎΠ³ΠΎ состава ΠΏΠΎΠ»ΠΈ(стирол)Π°ΠΊΡ€ΠΈΠ»Π°Ρ‚ΠΎΠ²

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    The work is devoted to qualitative analysis of poly(styrene)acrylates, the definition of the content of styrene in them. The methods of IR, NMR spectroscopy and gas chromatography-mass spectrometry were used for analysis. It was shown that the integrated use of modern spectral methods allows unambiguous to lead identification of the components in the copolymer and to use of spectral data for quantitative determinations.Π Π°Π±ΠΎΡ‚Π° посвящСна качСствСнному Π°Π½Π°Π»ΠΈΠ·Ρƒ полистиролакрилатов, ΠΎΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½ΠΈΡŽ содСрТания Π² Π½ΠΈΡ… стирола. Для провСдСния Π°Π½Π°Π»ΠΈΠ·Π° Π±Ρ‹Π»ΠΈ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Π½Ρ‹ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹ ИК-, ЯМР спСктроскопии ΠΈ Π³Π°Π·ΠΎΠ²ΠΎΠΉ Ρ…Ρ€ΠΎΠΌΠ°Ρ‚ΠΎ-масс-спСктромСтрии. Π‘Ρ‹Π»ΠΎ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, Ρ‡Ρ‚ΠΎ комплСксноС использованиС соврСмСнных ΡΠΏΠ΅ΠΊΡ‚Ρ€Π°Π»ΡŒΠ½Ρ‹Ρ… ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ² позволяСт ΠΎΠ΄Π½ΠΎΠ·Π½Π°Ρ‡Π½ΠΎ провСсти ΠΈΠ΄Π΅Π½Ρ‚ΠΈΡ„ΠΈΠΊΠ°Ρ†ΠΈΡŽ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚ΠΎΠ² Π² сополимСрС, Π° Ρ‚Π°ΠΊΠΆΠ΅ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Ρ‚ΡŒ ΡΠΏΠ΅ΠΊΡ‚Ρ€Π°Π»ΡŒΠ½Ρ‹Π΅ Π΄Π°Π½Π½Ρ‹Π΅ для количСствСнных ΠΎΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½ΠΈΠΉ

    Synthesis and kinetics of the cyclization of 3-(dialkylaminophenyl)-2- (phenylcarbonyl)-prop-2-enenitriles

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    The reaction of ortho-(N,N-dialkylamino)benzaldehydes with benzoylacetonitrile gave fused 1,2,3,4-tetra-hydroquinolino-5-carbonitriles due to cyclization of the intermediate 2-(phenylcarbonyl)-3-[2-[(dialkyl-amino) phenyl]prop-2-enenitriles through a tert-amino effect mechanism. Kinetic studies were carried out on the cyclization of 2-(phenylcarbonyl)-3-[2-(piperidin-1-yl) phenyl]prop-2-enenitrile. Β© 2013 Springer Science+Business Media New York

    ChemInform Abstract: SYNTHETISCHE ANALOGA DES KINETINS

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