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  • Chemistry  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 15 (1971), S. 2149-2172 
    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: This study was undertaken to measure quantitatively the flammability characteristics of cotton and polyester fibers. The smoke density generated during the burning of these fabrics was also studied at various temperature conditions. A mathematical relationship was established between the results obtained in an oxygen-depleted atmosphere chamber and those obtained in a chamber in which there was constant replenishing of an oxygen and nitrogen atmosphere. Three commercially available flame-retardant treatments were utilized in this study. The effect of temperature as well as the influence of fabric weight on the flammability behavior and the smoke density of these fabrics were investigated. A novel instrument built according to ASTM standards was employed throughout this study; it was found to be versatile, convenient, and highly reproducible in the generation of the data. It was found that polyester fabrics generate far more smoke than cotton fabrics without the phenomenon of afterglow. It was found also that as the temperature increases, the smoke density of cotton fabrics increases as well, but in the case of polyester fabrics the opposite relationship was obtained.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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  • 2
    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
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  • 3
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 7 (1967), S. 35-37 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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
    Additional Material: 3 Tab.
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 98 (1966), S. 275-284 
    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: Kristalline Copolymere von 3-Methylbuten mit 2,4-Dimethyl-2,7-octadien oder 2,6-Dimethyl-2,7-octadien wurden mit 28-40-proz. Umsatz hergestellt. Die bei einer Temperatur von 25°C in n-Heptan mit ZIEGLER-NATTA-Katalysatoren hergestellten Copolymeren sind in chlorierten organischen Lösungsmitteln unlöslich, besitzen scharfe kristalline Schmelzpunkte und wurden aus der Schmelze in Fasern versponnen. Die quantitative Analyse der substituierten Doppelbindung in diesen Copolymeren wurde mit Hilfe der Bromierungsreaktion und durch Messung der molaren Absorption der R′CH=CR′′R′′′-Doppelbindung im Vergleich mit 2,6-Dimethyl-2,7-octadien durchgeführt. Die chemische Struktur der Copolymeren wird mit Hilfe von Röntgendiagrammen und IR-Spektren aufgeklärt.
    Notes: Crystalline copolymers of 3-methylbutene and 2,4-dimethyl-2,7-octadiene and 2,6-dimethyl-2,7-octadiene, respectively, were obtained in yields of 28 40%. The copolymers, which were prepared in n-heptane with ZIEGLER-NATTA catalysts at 25°C. were insoluble in chlorinated organic solvents, had sharp, crystalline melting points and were melt-spun into fibers. Quantitative analysis of the substituted double bond present in these copolymers were made by the bromination reaction and by use of the molar absorptivity of the R′CH=CR′′R′′′ unsaturation using the 2,4-dimethyl-2,7-octadiene polymer as reference. The Chemical structure of these copolymers has been documented by their X-ray diagrams and infrared spectra.
    Additional Material: 9 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 78 (1966), S. 388-389 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    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.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 5 (1966), S. 415-415 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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