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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 66 (1978), S. 105-112 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde der thermische Abbau von Polyvinylchlorid uner Stickstoff in Diäthyl-Dibuyl- und Dioctylmaleat zwischen 160 und 210°C untersucht. Die Dehydrochlorierungsgeschwindigkeit ist in Dibutylmaleat am höchsten und in Dioctylmaleat am niedrigsten. Die aktivierungsenergie liegt bei 83,6, 122,7 und 150,5 kJ mol-1 für Diäthyl-Dibuyl- und Dioctylmaleat. Die Dehydrochlorierungsgeschwindigkeit und die Aktivierungsenergien liegen in Alkylmaleaten höher als in áthylbenzoat. In alkylmaleaten sind die Absorptionen im sichtbaren UV erheblich verringert.
    Notes: The thermal degradation of poly(vinyl chloride) has been investigated in diethyl, dibutyl and dioctyl maleate under nitrogen from 160°C to 210°C. The rate of dehydrochlorination was highest in dibutyl maleate and lowest in dioctyl maleate. The apparent activation energy calculated from the average value of the rate constant at each temperature for diethyl, dibutyl and dioctyl maleate was found to be 83.6 kJ mole-1, 112.7 kJ mole-1, and 150.5 kJ mole-1, respectively. The rates of dehydrochlorination and the activation energy observed in alkyl maleates are higher than those observed in ethyl benzoate. In the visible range spectra the absorption at higher wavelengths is considerably reduced in alkyl maleates.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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