Depolarized Rayleigh Light Scattering Studies of Concentrated Aqueous Nitrate Solutions.

Abstract

Interferometric measurements of the reorientational relaxation time of the nitrate anion in concentrated aqueous calcium nitrate and zinc nitrate solutions have been made as a function of temperature and composition. Arrhenius plots of tau for Ca(NO3)2.X H2O, where X = 4, 5, and 5.6 and Zn(NO3)2.5 H2O are linear and yield activation energies in the range of 5.6 to 8.3 Kcal/mole. The data for Ca(NO3)2, which cover the most extensive range of viscosity and temperature, where non-Arrhenius and were best fitted by the Vogel-Tamman-Fulcher equation from which an ideal glass transition temperature was derived. The viscosity dependence of tau for both the Ca(NO3)2 and Zn(NO3)2 solutions was found to be between that predicted by the classical Stokes Einstein equation and that predicted using slip hydrodynamic boundary conditions. Nitrate rotation was found to be slower in Ca(NO3)2 solutions than in the corresponding Zn(NO3)2 solutions. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 15, 1980
Accession Number
ADA095047

Entities

People

  • Ernest B. Yeager
  • Mehmed Mehicic
  • Ronald A. Carpio

Organizations

  • Case Western Reserve University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Computer Programming
  • Equations
  • Experimental Data
  • Glass Transition Temperature
  • Light Scattering
  • Measurement
  • Military Research
  • New York
  • Relaxation Time
  • Scattering
  • Scientific Research
  • Spectra
  • Standards
  • Transition Temperature
  • United States
  • Waveplates

Readers

  • Combustion science or combustion engineering.
  • Fluid Dynamics.
  • Organic Chemistry