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  • 1
    Digitale Medien
    Digitale Medien
    Cationic modifications of polychloroprene (1982)
    Springer
    Polymer bulletin 7 (1982), S. 337-344 
    Details
    ISSN: 1436-2449
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Summary The synthesis of the novel graft-block copolymer poly[chloroprene-g-(isobutylene-b-α-methylstyrene)], i.e., a polychloroprene backbone carrying isobutylene/α-methylstyrene block copolymer branches, is described. The synthesis was accomplished by exploiting detailed insight into the mechanisms of initiation of isobutylene and α-methylstyrene polymerization, and termination of isobutylene polymerization.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00254288
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 2
    Digitale Medien
    Digitale Medien
    Termination rate constant in butyl acrylate batch emulsion polymerization (1989)
    Springer
    Polymer bulletin 21 (1989), S. 497-504 
    Details
    ISSN: 1436-2449
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Summary The kinetics of seeded batch emulsion polymerization of n-butyl acrylate (BA) have been investigated at 50°C using potassium persulfate (KPS) as the thermal initiator. The variations in the average number of radicals per particle (ñ) and termination rate constant (kt) have been determined as a function of conversion for particles of different sizes using established kinetic equations. Contrary to expectations, the values of ñ were found to be unusually high and the values of kt were found to be very low for all the reactions studied. The high values of ñ are consistent with the low rates of termination. An explanation has been proposed for the low values of kt based on preliminary computations of the energy barrier for rotation about the terminal C-C bond of the polymer chain end of polybutyl acrylate (PBA).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00271973
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
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