A comparative study is reported on the dynamics of a glass-forming system when the glass transition is approached through different paths: cooling, compression, and polymerization. In particular, the influence of temperature, pressure and connectivity on the dynamics has been investigated by dielectric spectroscopy. A phenomenological description of the behavior of the dielectric response shows the existence of both differences and deep similarities between the change of some dielectric parameters during a polymerization reaction and during the temperature or pressure changes. A unified reading of our experimental results can be given in the framework of the Adam-Gibbs theory.
Influence of temperature, pressure and connectivity on the dynamics of a glass-forming system investigated by dielectric spectroscopy
COREZZI, Silvia
;
2001
Abstract
A comparative study is reported on the dynamics of a glass-forming system when the glass transition is approached through different paths: cooling, compression, and polymerization. In particular, the influence of temperature, pressure and connectivity on the dynamics has been investigated by dielectric spectroscopy. A phenomenological description of the behavior of the dielectric response shows the existence of both differences and deep similarities between the change of some dielectric parameters during a polymerization reaction and during the temperature or pressure changes. A unified reading of our experimental results can be given in the framework of the Adam-Gibbs theory.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.