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Influence of temperature, pressure and connectivity on the dynamics of a glass‐forming system investigated by dielectric spectroscopy
Author(s) -
Corezzi Silvia,
Capaccioli Simone,
Casalini Riccardo,
Rolla Pierangelo,
Gallone Giuseppe
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200106)171:1<253::aid-masy253>3.0.co;2-y
Subject(s) - dielectric , dielectric spectroscopy , glass transition , polymerization , materials science , dynamics (music) , spectroscopy , thermodynamics , chemical physics , condensed matter physics , composite material , chemistry , polymer , physics , optoelectronics , electrode , quantum mechanics , acoustics , electrochemistry
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.