International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2529

Full Length Research Paper

Similar dielectric behaviour of polyphenylglycidyl-ether and diglycidyl-ether of bisphenol-A at glass transition temperature

Soheil Sharifi
Department of Physics, University of Sistan and Baluchestan, 98135-674 Zahedan, Iran.
Email: [email protected] or [email protected]

  •  Accepted: 24 January 2012
  •  Published: 16 March 2012

Abstract

 

In this work, the dynamics of the primary a- and the Johari-Goldstein (JG) b- processes are studied with dielectric spectroscopy. We found the relaxations at glass transition temperature in polyphenylglycidyl- ether and diglycidyl ether of bisphenol-A to be strongly correlated over a wide temperature T and pressure P range. Analysing the temperature and pressure behaviour of the a- and (JG) b-processes, a clear correlation has been found between the structural relaxation time, the Johari-Goldstein relaxation time and the dispersion of the structural relaxation.

 

Key words: Dielectric relaxation, nano-size motion, polyphenylglycidyl-ether (PPGE),diglycidyl-ether of bisphenol-A (DGEBA).