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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 176 (1975), S. 2971-2980 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The bulk polymerization of 3,3,3-trichloropropene with dicyclohexylperoxidicarbonate as initiator is studied. In the temperature range between 303 and 343 K, the initial rate of polymerization follows the relation: \documentclass{article}\pagestyle{empty}\begin{document}$$ v = k[{\rm Initiator}]^{0,5} [{\rm Monomer}] $$\end{document}For the temperature dependence of the overall rate constant the relation \documentclass{article}\pagestyle{empty}\begin{document}$$ k = 5,8 \cdot 10^8 \exp [( - 82,124\,{\rm kj}\,{\rm mol}^{{\rm - 1}} )/(RT)]{\rm dm}^{3/2} \,{\rm mol}^{ - 1/2} \,{\rm s}^{ - 1}$$\end{document} is valid. The rates of the initiation of the polymerization are determined by the inhibitor method with toluenechinon (2-methyl-l,4-benzoquinone). The efficiency of the initiator is 0,25±0,03 and the rate constants of propagation and termination, kp and kt, obey the relation: \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{\rm p} /k_{\rm t}^{0,5} = 15,05\,\exp [( - 20,112\,{\rm kj}\,{\rm mol}^{{\rm - 1}} )/(RT)]\,{\rm dm}^{{\rm 3/2}} \,{\rm mol}^{{\rm - 1/2}} {\rm s}^{{\rm - 1/2}}$$\end{document}
    Notes: Es wird die Polymerisation des 3,3,3-Trichlorpropens mit Dicyclohexylperoxydicarbonat als Initiator in Substanz untersucht. Im Temperaturbereich von 303-343 K gehorcht die Anfangsgeschwindigkeit der Polymerisation der Beziehung \documentclass{article}\pagestyle{empty}\begin{document}$$ v = k[{\rm Initiator}]^{0,5} [{\rm Monomer}] $$\end{document}Für die Temperaturabhängigkeit der Bruttogeschwindigkeitskonstante gilt: \documentclass{article}\pagestyle{empty}\begin{document}$$ k = 5,8 \cdot 10^8 \exp [( - 82,124\,{\rm kj}\,{\rm mol}^{{\rm - 1}} )/(RT)]{\rm dm}^{3/2} \,{\rm mol}^{ - 1/2} \,{\rm s}^{ - 1}$$\end{document} Die Initiierungsgeschwindigkeiten wurden mit der Inhibitormethode unter Verwendung von Toluchinon (2-Methyl-1,4-benzochinon) als Inhibitor bestimmt; der Radikalausbeutefaktor („efficiency“) beträgt 0,25±0,03. Zwischen den Geschwindigkeitskonstanten für Wachstum und Abbruch, kp und kt, besteht die Beziehung: \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{\rm p} /k_{\rm t}^{0,5} = 15,05\,\exp [( - 20,112\,{\rm kj}\,{\rm mol}^{{\rm - 1}} )/(RT)]\,{\rm dm}^{{\rm 3/2}} \,{\rm mol}^{{\rm - 1/2}} {\rm s}^{{\rm - 1/2}}$$\end{document}
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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