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  • Chemistry  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Thermodynamic studies on some interpolymer interactions and stability of polycomplexes (1995)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 226 (1995), S. 13-22 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Stabilitätskonstanten und zugehörige thermodynamische Parameter (ΔH°, ΔS°) eines intermakromolekularen Komplexes aus Poly(acrylsäure-co-acrylamid), Poly(methacrylsäure-co-acrylamide) und Poly(N-vinylpyrrolidon) wurden mit bekannten Methoden bei verschiedenen Temperaturen bestimmt. Dabei wurde eine stufenweise Auflösung des Komplexes in Abhängigkeit von der Temperatur beobachtet, die mit den Stabilitätskonstanten und den thermodynamischen Parametern korreliert wurde.
    Notes: Stability constant and related thermodynamic parameters (ΔH° and ΔS°) of a multicomponent intermacromolecular complex consisting of poly(acrylic acid-coacrylamide), poly(methacrylic acid-co-acrylamide) and poly(N-vinylpyrrolidone) have been determined using known methods. A distinct stepwise disintegration of the complex at different temperatures has been observed, and this could be correlated with the stability constant and thermodynamic parameters calculated at various temperatures.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1995.052260102
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  • 2
    Electronic Resource
    Electronic Resource
    Thermodynamic studies of some complexation systems involving methacrylic acid-acrylamide copolymer, poly(vinyl pyrrolidone) and poly(ethylene oxide) (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 32 (1994), S. 1169-1174 
    Details
    ISSN: 0887-624X
    Keywords: stability constant ; thermodynamic parameters ; acrylic copolymer ; neighboring group ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Interpolymer complexes of methacrylic acid-acrylamide copolymer have been prepared by the interaction of its comonomer units with two different homopolymers, and also with a single homopolymer. The stability constants and related thermodynamic parameters (e.g., ΔH0 and ΔS0) of the mixed complex were found to be significantly different from the single homopolymer complexes. This has been attributed to neighboring group influence and destabilization of various interacting forces at different temperatures. © 1994 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1994.080320619
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  • 3
    Electronic Resource
    Electronic Resource
    Phenolic copolymer/polyelectrolyte/non-ionic homopolymer interactions: thermodynamic and electrochemical studies in dimethylformamide/water mixtures (1996)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 197 (1996), S. 911-920 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: p-Aminobenzoic acid/p-hydroxybenzoic acid/formaldehyde copolymer (I) was prepared and characterized. An interpolymer complex of copolymer (I) was prepared by adding stoichiometric amounts of a polyelectrolyte [poly(methacrylic acid)] and non-ionic homopolymers [poly(N-vinyl-2-pyrrolidone) and poly(ethylene oxide)]. The stability constant and related thermodynamic parameters (ΔH0 and ΔS0) were determined in DMF-H2O mixtures of different compositions using Osada's method. The stepwise degradation of the complex is explained on the basis of the relative stability of various interacting forces, particularly in media of varying dielectric constant. Electrochemical studies in the media substantiate the observations from thermodynamic studies.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1996.021970313
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