Aqueous mixtures of 1,2-propylene glycol with added poly(acrylic acid), neutralized and with added salt, are used for aircraft deicing. This study reports data on the effects of varying the salt concentration, architecture, and temperature of a series of different mixtures. For a deicing fluid to be effective, it is desirable that it be able to create a liquid layer that is stable under low-shear conditions yet can be completely removed during the initial stages of takeoff. A number of the mixtures examined show a viscosity profile that is either almost independent of temperature or exhibits a peak. To gain a greater understanding of the factors responsible for the observed rheological behavior, a theoretical model was fitted to oscillatory data. Using two fitting parameters, it was possible to describe the changes in the observed behavior, suggesting that, as the temperature is varied, the extent of shielding of carboxylic add groups and the conformation of the chain balance one another to give an apparent temperature independence of the viscosity. The rheological data were used to interpret the boundary-layer displacement thickness data obtained from wind-tunnel measurements.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Rheology of poly(acrylic acid) in water/glycol/salt mixtures


    Contributors:

    Published in:

    Publication date :

    2013


    Size :

    9 Seiten, 11 Bilder, 2 Tabellen, 36 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Bioinspired Bioadhesive Polymers: Dopa-Modified Poly(acrylic acid) Derivatives

    Laulicht, B. / Mancini, A. / Geman, N. et al. | British Library Online Contents | 2012


    Gold Encapsulated Chitosan-Poly(acrylic acid) Hybrid Hollow Nanospheres

    Ding, Y. / Chen, Q. / Qian, H. et al. | British Library Online Contents | 2009




    Prediction of vapor-liquid equilibrium for salt-water-ethanol-ethylene glycol systems

    Cao, Y.-g. / Zhou, R.-q. / Duan, Z.-t. | British Library Online Contents | 2002