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  • 1955-1959  (3)
  • 1890-1899
  • 1959  (3)
  • Polymer and Materials Science  (3)
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Years
  • 1955-1959  (3)
  • 1890-1899
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 1 (1959), S. 28-36 
    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 force as a function of temperature at constant length for cellulose model filaments swollen in water shows a maximum the temperature of which decreases with increasing orientation. At an orientation achieved by a prestretch of 80%, no more maximum exists, and the force decreases monotonically with increasing temperature. This behavior cannot be attributed to changes in the entropy and enthalpy of elongation with temperature, but is due rather to changes in the degree of swelling. When corrections are made for this, the positive force-temperature coefficient observed for some of the curves becomes negative. The equilibrium stress-strain curves are linear up to elongations of 5%. The-oretical evaluation of these curves is not possible with the present state of theory. Filaments with predominantly a skin structure show a minimum in the force-temperature curves; this is the more common behavior.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 38 (1959), S. 513-520 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Linear ortho-para linked phenol-formaldehyde polymers were prepared by the addition of tetrahydrofuran solutions of o-chlorophenol-formaldehyde polymers to liquid ammonia containing sodium. The resulting phenol-formaldehyde polymers were crosslinked much more slowly by reaction with hexamethylenetetramine than were the isomeric ortho-ortho linked phenol-formaldehyde polymers. Infrared and acetylation studies were consistent with proposed structure.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 31 (1959), S. 192-196 
    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 werden neue Anionen-Austausch-Membranen beschrieden, dargestellt aus Lösungen von Dynel und Poly-N-vinylimidazol, die mit einem Überschuß an Säure neutralisiert und in einem polaren organischen Lösungsmittel gelöst wurden. Diese hoch selektives Membranen konnten durch gelichzeitige Quaternierung und Vernetzung der freien Base mit 1,5-Dibrompentan so verbessert werden, daß sie in 0,1 m KCl-Lösungen praktisch theoretische Konzentrationspotentiale ergaben.
    Notes: New anion-exchange membranes are described, prepared from solutions of Dynel and poly-N-vinylimidazole neutralized with an excess of acid, and dissolved in a polar orgamic solvent. These highly selective membranes could be further improved to give virtually theoretical concentration potentials in 0.1 M potassium chloride solutions by simultaneous quaternization and cross-linking of the free base form by 1.5-dibromopentane.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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