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- W1908157433 abstract "The red-violet complex which was formed from partially saponified poly(vinyl acetate) and iodine in the presence of potassium iodide was investigated by the Benesi-Hildebrand method. The molar absorption coefficient of the complex at the absorption maximum (488 nm) was found to be 4,74.1041/(mol cm) at 10°C and to decrease with rising temperature. The concentration of units resulting from vinyl acetate (acetoxyethylene units), which can take part in the complex formation with iodine, was below 1% of the total content of acetoxyethylene units in the polymer. The changes of enthalpy (ΔH) and entropy (ΔS) were found to be −45,01 kJ mol−1 (−10,75 Kcal/mol) and −48,40 J mol−1 K−1 (−11.56 cal mol−1 K−1) at 15°C, respectively. Der rot-violette Komplex, der sich aus teilverseiftem Polyvinylacetat und Jod in Gegenwart von Kaliumjodid bildet, wurde mit der Benesi-Hildebrand-Methode untersucht. Der molare Absorptionskoeffizient des Komplexes beim Absorptionsmaximum (488 nm) betrug 4,74.104l/(mol cm) bei 10°C und fiel mit steigender Temperatur. Die Konzentration der aus Vinylacetat resultierenden Bausteine (Acetoxyäthylen-Bausteine), die an der Komplex-Bildung mit Jod teilnehmen können, lag unter 1% der Gesamtmenge an Acetoxyäthylen-Bausteine. Die Enthalpie- (ΔH) und Entropie-Änderung (ΔS) wurden zu −45,01 kJ mol−1 (−10,75 Kcal/mol) bzw. −48,40 J mol−1 K−1 (−11,56 cal mol−1 K−1) bei 15°C bestimmt." @default.
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- W1908157433 date "1975-11-01" @default.
- W1908157433 modified "2023-10-17" @default.
- W1908157433 doi "https://doi.org/10.1002/macp.1975.021761108" @default.
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