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  • 1
    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: Die Polymerisation von Styrol mit dem System Benzoylperoxyd/Di-n-alkylanilin wurde bei 30°C in Benzol kinetisch untersucht. Es ergab sich, daß die Polymerisationsgeschwindigkeit proportional der Quadratwurzel der Ausgangskonzentrationen des Benzoylperoxyds und des Di-n-alkylanilins war. Die Zersetzungsgeschwindigkeit des Benzoylperoxyds durch Di-n-alkylanilin in Anwesenheit von Styrol ist proportional den Ausgangskonzentrationen des Benzoylperoxyds und des Di-n-alkylanilins.Die Abhängigkeit der Polymerisationsgeschwindigkeit des Styrols und der Zersetzungsgeschwindigkeit des Benzoylperoxyds von der Kohlenstoffzahl der Alkylgruppen des Di-n-alkylanilins war ähnlich der in früheren Berichten beschriebenen. Aus dem Zusammenhang der Polymerisationsgeschwindigkeit des Styrols und der Zersetzungsgeschwindigkeit des Benzoylperoxyds wurden die Werte der Initiatorwirksamkeit berechnet.
    Notes: The polymerization of styrene was carried out in benzene at 30°C. As initiator, a system of benzoyl peroxide - di-n-alkylaniline was applied. It was found that the initial rate of polymerization was proportional to the square root of the initial concentrations of both benzoyl peroxide and di-n-alkylaniline. The decomposition of benzoyl peroxide with di-n-alkylaniline was also carried out in the presence of styrene and it was found that the initial rate of decomposition was proportional to the initial concentrations of benzoyl peroxide and di-n-alkylaniline. The plots of the initial rate constant of the polymerization of styrene and that of decomposition of the benzoyl peroxide vs. the number of carbons of the alkyl group of di-n-alkylaniline showed a similar trend as those obtained in the previous paper. From the relationship between the initial rates of polymerization of styrene and that of the decomposition of benzoyl peroxide, the values of the initiator efficiency were computed.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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