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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of some aliphatic polyamides containing 4,4′-azodiphenylene units (1983)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 184 (1983), S. 2225-2230 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polyamides containing azo groups were prepared by the phosphorylation method from 4,4′-diaminoazobenzene and malonic, succinic, glutaric, adipic, azelaic, sebacic, or chlorosuccinic acid. The polymers were characterized by their viscosity and solubility, and by UV-visible and IR spectroscopy, TG, and DTA.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1983.021841104
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  • 2
    Electronic Resource
    Electronic Resource
    Conformational transition in poly(methacrylic acid)NCL Communication Number: 3483. (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 123-129 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The potentiometric behaviour of poly(methacrylic acid) was examined in water/1,4-dioxane mixtures at 25°C. Conformational transitions were observed in about the same range of apparent ionization in the 1,4-dioxane concentration range 0 to 15 vol.-%. Transitions were not observed in the 1,4-dioxane concentration range 20 to 35% and the corresponding Henderson-Hasselbalch plots were found to be linear. Phase separations were observed to occur beyond 40 vol.-% 1,4-dioxane. The free energy of the conformational transition decreased very rapidly with the initial incorporation of 1,4-dioxane but slowly at higher concentrations. Van der Waals methyl-methyl interactions as the cause of the compact form has been inferred. The large increase in intrinsic viscosity observed for the unneutralized poly(methacrylic acid) in a relatively narrow range of composition of the 1,4-dioxane/water mixtures has been ascribed to a solvent induced conformational transition.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021860112
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