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  • 1
    Electronic Resource
    Electronic Resource
    A new polyelectrolyte with acid-base indicating properties (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2527-2532 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Poly(styrene-co-acrylic acid) on sulfonation with concentrated sulfuric acid exhibits an unusual acid-base indicating property: an intense purple colour in alkali which changes sharply to yellow at the equivalence point. The acid-base indicating property of the polymer can not be explained by the simple structure of the sulfonated copolymer. On the basis of infrared and nuclear magnetic resonance studies it is suggested that the copolymer during sulfonation undergoes an internal Friedel Crafts acylation followed by cyclic dehydration leading to a conjugated structure. A possible mechanism is proposed for the colour change with change in pH. The copolymer was prepared also in form of spherical beads which can be used repeatedly as indicator in acid-base titrations.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Grafting of methyl methacrylate on modified poly(vinyl chloride) (1980)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 1 (1980), S. 613-616 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1980.030011003
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  • 3
    Electronic Resource
    Electronic Resource
    Solution properties of poly(methyl methacrylate) in mixtures of two nonsolvents (carbon tetrachloride and n-alcohols) (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 166 (1973), S. 227-234 
    Details
    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: Binäre Mischungen aus CCl4 und verschiedenen Alkoholen sind Cosolventien für Poly(methylmethacrylat). Das Mischlösungsvermögen wird durch die thermodynamische Annäherung von SCOTT erklärt, die spezifische Lösungsmitteleffekte berücksichtigt. In Gegenwart von Licht wurde eine Reaktion zwischen CCl4 und Alkohol beobachtet. Die in Co-solventien erhaltenen ungestörten molekularen Dimensionen stimmen gut mit denen der Literatur überein.
    Notes: Binary mixtures of CCl4 and several n-alcohols comprise cosolvents for poly(methyl methacrylate). The cosolvency has been explained in terms of the thermodynamic approach of SCOTT and also taking into account some specific effects. In the presence of light a reaction between CCl4 and alcohol was observed. Unperturbed molecular dimensions determined in the cosolvents agree well with those reported in the literature.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021660120
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