| Issue |
Europhys. Lett.
Volume 70, Number 5, June 2005
|
|
|---|---|---|
| Page(s) | 614 - 620 | |
| Section | Condensed matter: structural, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2005-10029-y | |
| Published online | 27 April 2005 | |
Relationship between dynamics and thermodynamics in glass-forming polymers
1
Fundación Donostia International Physics Center Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
2
Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU) y Unidad de Física de Materiales Centro Mixto (CSIC-UPV/EHU), Facultad de Química Apartado 1072, 20080 San Sebastián, Spain
Received:
28
January
2005
Accepted:
8
April
2005
We have tested the validity of the Adam-Gibbs (AG) equation to glass-forming polymers by means of dynamics data from dielectric relaxation and thermodynamic data. The AG equation holds for polymers with simple monomeric chemical structure, whereas it seems to fails for more complex systems possessing secondary relaxation processes with some degree of intra-chain cooperativity. However, we found that the AG equation still works once the contribution to the excess entropy of intra-chain secondary relaxation processes uncoupled to the α process is removed. This contribution results to be essentially temperature independent.
PACS: 61.41.+e – Polymers, elastomers, and plastics / 64.70.Pf – Glass transitions / 61.43.Fs – Glasses
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.