Abstract
AbstractDynamic light scattering experiments are carried out with aqueous solutions of poly(2‐vinylpyridine) quarternized to small extents with ethyl bromide and dissolved in an aqueous solution of KBr (molar mass, Mw = 3.14·105 g mol−1; Mw/Mn = 2.24; degree of quarternization, αe; 0.079 ≤ αe ≤ 0.461; electrolyte concentration, cs = 1·10−2 c+, c+ = 1 mol dm−3). Apparent diffusion coefficients Dapp(αe,c̄p) are calculated from the data (c̄p, polymer concentration (g dm−3)). They are plotted as a function of the reduced composition variable Λ= αecp*/cs (cp*, molar volume concentration of the repeat unit of the polymer backbone). For Λ <<1 one apparent diffusion coefficient is observed. In the range Λ ≈︁1 the value of the apparent diffusion coefficient increases with increasing values of (αecp*) and a slow diffusive mode gradually appears. For Λ >>1 a fast and a slow diffusive process is found. In the literature such a behaviour has been reported for solutions of highly charged polyelectrolytes.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Berichte der Bunsengesellschaft für physikalische Chemie
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
