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  • 1975-1979  (6)
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  • 1
    Publication Date: 1977-11-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 2
    Publication Date: 1977-11-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 255 (1977), S. 1144-1144 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 255 (1977), S. 1144-1144 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 5
    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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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 176 (1975), S. 2981-2986 
    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: A study of the kinetics of the bulk copolymerization of 3,3,3-trichloropropene (TClP) with styrene initiated by dicyclohexylperoxidicarbonate at 60°C was carried out. The dependence of the copolymerization rate on the composition of the monomer mixture was determined. Assuming a linear relationship between the initiation rate vi and the composition of the monomer mixture, the parameter Φ (relative constant of alternating termination) was calculated to increase not monotonically from 81 to 243 as the mole fraction of styrene in the monomer mixture varies from 0,136 to 0,851. Experimentally it was demonstrated, however, that vi does not depend linearly on the composition of the monomer mixture. With the experimental values for vi, Φ was calculated to be 72±10, independent of the composition of the monomer mixture. The monomer reactivity ratios for the system TClP/styrene are found to be r1 (TClP)=0,017 and r2 (styrene)=7,8.
    Notes: In dieser Arbeit werden Untersuchungsergebnisse über die Kinetik der mit Dicyclohexyl-peroxidicarbonat initiierten Substanz-Copolymerisation von 3,3,3-Trichlorpropen (TClP) mit Styrol bei 60°C mitgeteilt. Es wurde die Abhängigkeit der Copolymerisationsgeschwindigkeit von der Zusammensetzung des Monomergemisches bestimmt. Unter Annahme einer linearen Abhängigkeit der Initiierungsgeschwindigkeit vi von der Zusammensetzung des Monomergemisches wurde der Parameter Φ (relative Konstante des alternierenden Abbruchs) berechnet, wobei mit Änderung des Molenbruchs von Styrol in der Mischung von 0,136 bis 0,851 die Konstante Φ nicht monoton von 81 bis 243 ansteigt. Experimentell wurde jedoch gezeigt, daß vi keine lineare Funktion der Zusammensetzung der Monomermischung ist. Mit den experimentellen Werten für vi folgt unabhängig von der Zusammensetzung des Monomergemisches für Φ ein Wert von 72±10. Die Copolymerisationsparameter für das System TClP/Styrol betragen r1 (TClP)=0,017 und r2 (Styrol)=7,8.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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