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  • 1
    Electronic Resource
    Electronic Resource
    Ion pair-ion pair and ion-dipole interactions in polyurethane-styrene blends (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 3317-3323 
    Details
    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: It is shown that ion pair-ion pair interactions can be utilized to achieve miscibility in blends of urethanes with styrene ionomers. The urethanes contain quaternary ammonium salts in the hard segments, while the styrenes contain sodium methacrylate groups (∼9.6 mol %). By contrast, ion-dipole interactions are not strong enough to achieve miscibility enhancement; a polyurethane containing short (ethylene oxide) sequences in the hard segment did not exhibit miscibility with a styrene-lithium methacrylate copolymer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070300814
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A dielectric study of the glass transition region in urethane elastomers modified by ionic bonds (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 31 (1986), S. 1111-1118 
    Details
    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: The uretane elastomers cross-linked by the varying content of triethanolamine and 3-bromine-1,2-propanediol have been investigated by means of dielectric spectroscopy. The complex character of the glass-rubber transition has been determined. It results from different mechanisms of cross-linking (urethane and ionic bonds). The influence of content of cross-linking mixture on the microphase separation has been observed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070310413
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ionomeric blends. IV. Miscibility of urethane elastomers with styrene-styrene sulfonic acid copolymer (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 755-762 
    Details
    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: Blends were prepared from two kinds of urethane elastomers, containing 1,4-butanediol or 3,3′-dichloro-4,4′-diamino-diphenyl-methane as chain extenders, with lightly sulfonated polystyrenes. Dynamic mechanical studies show that strong interactions occur between the sulfonic acid and the urethane or urea moieties on the polyurethane chains. These strong interactions are clearly seen in the composition dependence of the loss tangent peaks (due to the glass transitions) for both the high temperature and the low temperature glass transitions of the blends. They are further confirmed by model studies.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1984.070290304
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  • 4
    Electronic Resource
    Electronic Resource
    Ion - dipole interactions in polyether polyurethane - styrene ionomers blends (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 33 (1987), S. 2833-2838 
    Details
    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: It is shown that polyurethanes containing polyether segments of MW = 1000 or 2000 are miscible with styrene ionomers. The soft segment interacts with the ionomer via ion - dipole interactions, but some of the hard segments containing ether moieties are also incorporated into the polystyrene.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1987.070330817
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Sulphur vulcanized urethane elastomers processed with zinc chloride as catalyst of synthesis and activator of vulcanization (1980)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 31 (1980), S. 673-679 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Untersuchungen von mit Schwefel vulkanisierten Urethanelastomeren, die aus Poly(ethylenpropylen)adipinat, α-Allylglycerinether und Toluen-diisocyanat synthetisiert wurden, werden beschrieben. Die Synthese der Elastomere wurde bei verschiedenen Temperaturen und Reaktionszeiten unter Benutzung von Zinkchlorid als Katalysator und Aktivator der Vulkanisation durchgeführt. Die Untersuchungen zeigten einen kombinierten komplexen Einfluß des Zinkchlorids, der Temperatur und der Reaktionszeit auf die Plastizität und die Verarbeitungseigenschaften der erhaltenen Elastomere sowie auf die mechanischen Eigenschaften der Vulkanisate.
    Notes: Investigations on sulphur cured urethane elastomers synthesized from poly(ethylene-propylene) adipate, α-allyl glycerin ether and toluene diisocyanate are described. Synthesis of elastomers was conducted at various temperatures and times with and without zinc chloride as catalyst and activator of sulphur vulcanization. The experiments revealed a combined effect of zinc chloride, temperature and time of synthesis on plasticity and processing properties of the elastomers and on mechanical properties of the vulcanizates.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1980.010311102
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Structure elucidation of two diphenylhydantoin derivatives via 1H and 13C NMR spectroscopy (1995)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 33 (1995), S. 586-591 
    Details
    ISSN: 0749-1581
    Keywords: 1H NMR ; amphipathic structure ; diphenylhydantoin derivatives ; anticonvulsants ; antidepressant ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The solution conformations of 1-benzyl-5,5-diphenyl-2,4-dioxo-3-imidazolidineacetic acid (AC) and 3-(2,4-dichlorobenzyl)-5,5-diphenyl-2,4-dioxo-1-imidazolidine acetic acid (AD) were studied by proton and carbon NMR spectroscopy. The two drugs have different pharmacological activities, AC having anticonvulsant and AD having antidepressant but no anticonvulsant properties. The relative orientations of the hydantoin ring substituents were investigated and are discussed in terms of amphipathic distribution of polar and apolar domains.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260330716
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