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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 265 (1987), S. 181-183 
    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
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 153 (1972), S. 289-306 
    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: Phosphorous ylids, R3P=CH—X and R3P=CH2·LiBr, are able to start an anionic polymerization of vinyl monomers. The ylids are attached to the polymers as well detectable end groups. The ability to initiate the polymerization depends on the basicity of the ylidcarbanions. The structure of the free phosphorous ylids has no influence on the molecular weight and the tacticity of the polymers. Contrary results are obtained with the “salt-complexed” phosphorous ylids. In this case the substituents of the phosphorous atom have a distinct influence on the tacticity of the resulting polymers.
    Notes: Phosphorylide, R3P=CH—X und R3P=CH2·LiBr, können eine anionische Polymerisation von Vinylmonomeren starten. Dabei werden im Falle des Methacrylnitrils und des Methylmethacrylats die Ylide als Endgruppen in die Polymeren eingebaut. Bei den salzfreien Yliden hängt die Startwirksamkeit von der Basizität des Ylidcarbanions ab, die Struktur dieser Ylide hat aber keinen meßbaren Einfluß auf das Molekulargewicht und die Taktizität der entstehenden Polymeren. Im Gegensatz dazu wird bei der Initiierung mit den salzhaltigen Yliden auch die Taktizität der Polymeren von den Substituenten der Phosphorylide beeinflußt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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