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  • 1985-1989  (2)
  • 1975-1979
  • 1986  (2)
  • Polymer and Materials Science  (2)
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  • 1985-1989  (2)
  • 1975-1979
Year
  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 31 (1986), S. 1763-1769 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Graft copolymerization of methyl methacrylate (MMA) was carried out on jute fibers using a V5+ -cyclohexanone redox initiator system. The effect of the concentration of acid, monomer, and V5+ on graft yield have been studied. In order to obtain optimum conditions of grafting, the effects of temperature, acid, reaction medium, solvent, and some inorganic salts on graft yield have been investigated. The most remarkable features of the investigation include the proposition of a mechanism and derivation of rate expression for the grafting process. More than 100% grafting could be achieved with the present system.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 142 (1986), S. 69-78 
    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: Kinetik und Mechanismus der Verzögerung der Polymerisation von Acrylnitril mit einem V5+-Thioharnstoffkomplex als Initiator durch Phenol wurden im Temperaturbereich von 40-50°C untersucht. Die Auswirkung von Verzögerungsagens (Phenol), Metallion, Monomerem, Schwefelsäure, einigen anorganischen Salzen und organischen Lösungsmitteln wurden ebenfalls untersucht. Die bemerkenswerteste Beobachtung in der vorliegenden Untersuchung ist die Tatsache, daß bei der Auftragung von [M]/Rp gegen 1/[M] ein positiver Achsenabschnitt erhalten wird. Ein Reaktionsmechanismus und eine passende Geschwindigkeitsgleichung wurde vorgeschlagen und anhand der experimentellen Ergbnisse erläutert.
    Notes: Studies have been made on the kinetics and mechanism of the retardation of V5+-thiourea initiated polymerization of acrylonitrile by phenol in the temperature range 40 - 50°C. The effects of retarder (phenol), metal ion, monomer, sulphuric acid, some inorganic salts, and organic solvents have also been studied. The most remarkable observation in the present investigation is the positive intercept obtained from the plot of [M]/Rp vs. 1/[M]. A reaction mechanism has been suggested and a suitable rate expression has been proposed and explained in the light of experimental findings.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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