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  • 1
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 13 (1967), S. 379-383 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Numerical solutions of the equations that describe steady state, forced-convection mass transfer around single circulating or noncirculating gas bubbles have been obtained for both first- and second-order chemical reaction conditions. For the noncirculating bubbles, solutions have been obtained up to Reynolds numbers of 200 with Kawaguti velocity profiles used to describe the flow. In the case of circulating gas bubbles, Kawaguti profiles have been utilized up to Reynolds numbers of 80, while the potential flow velocity profiles have been used for higher Reynolds numbers. The numerical results for circulating gas bubbles have been compared with penetration theory for both first- and second-order chemical reactions. For the case of noncirculating gas bubbles the solutions for physical mass transfer have been compared with the Ranz and Marshall correlation as well as with the results of Griffith and the more recent work of Tsubouchi and Masuda.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Steady state solutions of the Navier-Stokes equations for Reynolds numbers of 0.1, 1, 50, 100, and 200 have been obtained by using finite-difference methods. The effects of radial and angular step size and wall proximity have been investigated. Results were found in the form of stream function and vorticity distributions with pressure distributions and drag coefficients calculated from them. The results compare favorably with experimental data and show a steady trend from Hadamard-Rybczynski flow to boundary-layer flow after Levich-Chao-Moore. For a circulating sphere of low viscosity there is no flow separation indicated at Reynolds numbers equal to or less than 200.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 85 (1965), S. 273-279 
    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: Es wurde der Versuch unternommen, das ungewöhnliche kinetische Verhalten der durch Butyllithium in Kohlenwasserstoffen als Lösungsmittel ausgelösten Copolymerisation von Butadien und Styrol experimentell zu analysieren. Dabei wurde festgestellt, daß die Reaktionsgeschwindigkeit von Styrol mit Polybutadienyllithium mit und ohne Butadien dieselbe ist und daß sich die Reaktion von Butadien mit Polystyryllithium durch eine sehr große Geschwindigkeit auszeichnet. Der kinetische Verlauf der Copolymerisation kann durch Annahme von vier normalen bimolekularen Reaktionsschritten erklärt werden. Es ist nicht nötig, eine bevorzugte Absorption an den Reaktionszentren anzunehmen, um den anfänglich großen Gehalt von Butadien im Copolymeren zu erklären.
    Notes: An attempt has been made to analyse experimentally the unusual copolymerization of butadiene with styrene initiated by Butyllithium in hydrocarbon solvents. The rates of reaction of styrene with polybutadienyllithium have been measured in both the presence and absence of butadiene, and found to be the same. The reaction of butadiene with polystyryllithium is found to be extremely fast. It is thought that the copolymerization can be explained in terms of four normal bimolecular reactions. No recourse has to be taken to preferential absorption at the reaction centre to explain the initial high butadiene content of the copolymer.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 82 (1965), S. 53-59 
    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: Die Kondensation von Triphenylamin mit Bissäurechloriden gab mit Zinkchlorid bei 25°C oder mit Aluminiumchlorid bei 5°C lösliche, lineare Polymere. Phosgen, Thionylchlorid und Dichlormethan kondensierten mit Triphenylamin ebenfalls zu Polymeren. Die Substitution in p-Stellung erfolgte nur an zwei Phenylresten bei Verwendung von ZnCl2. Die Substitution am dritten Phenylrest in Gegenwart von AlCl3 führte zu vernetzten Polymeren, was durch Änderung der Bedingungen vermeidbar war.
    Notes: Linear, soluble polymers were prepared by condensing triphenylamine with diacid chlorides in the presence of zinc chloride at 25°C. or aluminum chloride at 5°C. Polymers were also obtained from condensations of phosgene, thionyl chloride, and dichloromethane with triphenylamine. Substitution occurred in the para-position on only two of the phenyl rings when zinc chloride was used. Substitution on the third ring which resulted in cross-linked polymers occurred in the presence of aluminum chloride but was avoided by modifying the conditions.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 622-625 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    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 3 (1965), S. 449-455 
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A kinetic study has been made of the polymerization of butadiene and styrene in an aliphatic hydrocarbon solvent with the use of butyllithium as an initiator. It is shown that the anomalous behavior in the initiation reaction exhibited by isoprene under these conditions is also found for these two monomers. These monomers give a sigmoidal rate curve in the initiation reaction in cyclohexane solution, and the reaction appears to be auto-catalytic. The propagation reactions were studied also, and the results compared with the rather discordant sets of data published by other authors.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 7 (1968), S. 623-625 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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