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  • 1960-1964  (2)
  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 56 (1962), S. 200-207 
    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: Durch Polymerisation von Phenyl- oder n-Butylisocyanat in verschiedenen Lösungsmitteln in Gegenwart anionischer Katalysatoren wie Lithium- oder Natriumalkylen wurden kristalline Polymere erhalten.Für beide Polymere werden die IR-Spektren, die Röntgenbeugungsspektren und andere physikalische Eigenschaften wiedergegeben. Die möglichen Strukturen der beiden kristallinen Polymeren werden diskutiert. Mit kationischen Katalysatoren (z. B. AlBr3) wurden im Fall des Phenylisocyanats amorphe Polymere erhalten, während das n-Butyl-isocyanat keine Polymere lieferte.
    Notes: By polymerizing phenyl or n-butyl isocyanate in various solvents in the presence of anionic catalysts such as lithium or sodium alkyls, crystalline polymers were obtained. For both polymers, the I.R. spectra, the X-ray diffraction spectra and other physical properties are reported. The possible structures of the two crystalline polymers are discussed. By cationic catalysts (e.g. AlBr3) amorphous polymers were obtained from phenylisocyanate, but no polymers from n-butylisocyanate.
    Additional Material: 4 Ill.
    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
    Journal of Polymer Science Part A: General Papers 1 (1963), S. 403-409 
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The reaction of two molecules of AlRCl2 with an electron donor molecule D, gives rise to the practically quantitative formation of AlR2Cl and AlCl3.D. This can explain the catalytic activity in the stereospecific polymerization of propylene to isotactic polymer of the systems prepared from violet TiCl3, AlRCl2, and an electron-donor substance. These systems have the same degree of stereospecificity as the systems consisting of AlR2Cl—TiCl3 (violet).
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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