Thermal characteristics of solid-solid phase transitions in long-chain dialkyl ammonium salts

  • Steinert S
  • Voigt W
  • Glausch R
 et al. 
  • 2

    Readers

    Mendeley users who have this article in their library.
  • 7

    Citations

    Citations of this article.

Abstract

A series of symmetrical dialkyl ammonium salts, DCnX, has been prepared and characterized with respect to temperature and enthalpy of solid-solid phase transitions, temperature of melting, thermal stability as well as the reversibility of the phase transitions. The number of carbon atoms, Cn, was varied between 8 and 18 and as anions X halides, nitrate, chlorate, perchlorate and hydrogen sulphate had been chosen. In dependence on chain length and anion type transition temperatures from 20 to 100°C were observed. Mass specific solid-solid transition enthalpies reach values of 185 J g-1, which makes this class of substances attractive for heat storage applications. The influence of anion type on the transition enthalpies is explained in terms of packing requirements, hydrogen bond network formation and contributions from hindered anion rotation. © 2005 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Dialkyl ammonium salts
  • Heat storage materials
  • Rotator phases
  • Solid-solid phase transition

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • S. Steinert

  • W. Voigt

  • R. Glausch

  • M. Neuschütz

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free