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  • 1965-1969  (1)
  • 1960-1964  (2)
  • Carbodiimides  (1)
  • Organotin compounds  (1)
  • Polymer and Materials Science  (1)
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Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 85 (1965), S. 143-154 
    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: p-Vinylbenzophenone was obtained by GRIGNARD reaction from p-chlorostyrene and benzonitrile and was polymerized radically in bulk and copolymerized with styrene. The compositions of the copolymers with styrene were determined from the infrared spectra. The following monomer reactivity ratios for the radical copolymerization at 60°C. were found: r1 = 3.0 ± 0.3 (for p-vinylbenzophenone) and r2 = 0.18 ± 0.08 (for styrene).p-Vinyltriphenylcarbinol was obtained by GRIGNARD reaction from p-chlorostyrene and benzophenone or from p-vinylbenzophenone and phenylmagnesium bromide. It was polymerized radically in bulk and in benzene solution and copolymerized with styrene. The compositions of the copolymers were determined by photometrical analyses of the polymer p-vinyltriphenylmethyl-cations in conc. sulfuric acid. For the radical copolymerization of p-vinyltriphenyl-carbinol with styrene in benzene at 50°C. the following monomer reactivity ratios resulted: r1 = 1.60 ± 0.15 (for p-vinyltriphenyl-carbinol) and r2 = 0.47 ± 0.10 (for styrene).
    Notes: p-Vinylbenzophenon wurde durch GRIGNARD-Synthese aus p-Chlorstyrol und Benzonitril erhalten; es wurde radikalisch in Substanz polymerisiert und mit Styrol copolymerisiert. Die Zusammensetzung der Copolymerisate wurde aus IR-Spektren bestimmt. Für die radikalische Copolymerisation bei 60°C gelten folgende Copolymerisationsparameter: r1 = 3,0 ± 0,3 (für p-Vinylbenzophenon) und r2 = 0,18 ± 0,08 (für Styrol).p-Vinyltriphenylcarbinol wurde aus p-Chlormagnesiumstyrol durch Umsetzung mit Benzophenon sowie aus p-Vinylbenzophenon und Phenylmagnesiumbromid erhalten; es wurde in Substanz und in benzolischer Lösung radikalisch polymerisiert und mit Styrol copolymerisiert. Die Zusammensetzungen der Copolymerisate wurden durch photometrische Bestimmung der polymeren p-Vinyltriphenylmethyl-Kationen in konz. Schwefelsäure ermittelt. Daraus ergaben sich für die radikalische Copolymerisation von p-Vinyltriphenylcarbinol mit Styrol in Benzol bei 50°C folgende Parameter: r1 = 1,60 ± 0,15 (für p-Vinyltriphenylcarbinol) und r2 = 0,47 ± 0,10 (für Styrol).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 621-625 
    ISSN: 0570-0833
    Keywords: Carbodiimides ; Isocyanates ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Carbodiimides are formed with simultaneous evolution of CO2 by the reaction of basic catalyst with sterically hindered isocynates. Another generally applicable synthesis of carbodiimides involves intermediate formation of cyclic adducts of isocyanates and carbodiimides, which, upon cleavage, exchange the isocyanate and carbodiimide functions. Both processes are suitable for the preparation of polycarboiimides. Several commercial applications of mono- and polycarbodiimides are pointed out.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 2 (1963), S. 165-175 
    ISSN: 0570-0833
    Keywords: Organotin compounds ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: New synthetic methods developed in the field of organotin compounds since 1959 are reviewed. The use of alkyl aluminum compounds brings an advance in the preparation of tetraalkyltin derivatives, alkyltin halides, and alkyltin hydrides. Organotin hydrides offer new possibilities for the production of monomeric and polymeric organotin compounds. Diethyltin and diphenyltin, which are obtained by catalytic dehydrogenation of the respective dialkyltin dihydrides, are cyclic compounds. - The literature since 1959 is reviewed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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