Relaxation dynamics of rubbed polystyrene thin films
- 15 September 2000
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 51 (6) , 655-660
- https://doi.org/10.1209/epl/i2000-00388-9
Abstract
Optical retardation measurements were used to probe the chain relaxation dynamics in rubbed polystyrene films of varying thicknesses on glass substrates. A model based on Kohlrausch-Williams-Watts relaxation was developed and used to determine the glass transition temperature (Tg) of the films. Results showed reductions of 15–20 K in Tg for thin films of thicknesses comparable to the radius of gyration as well as for cast films rubbed with different strengths. These results provide evidence of a faster relaxation dynamics relative to the polymer-substrate interface for thinner films and enhanced chain mobility at the polymer-air interface.Keywords
This publication has 18 references indexed in Scilit:
- Glass transition temperature and dynamics of α-process in thin polymer filmsEurophysics Letters, 1999
- Study of the surface glass transition behaviour of amorphous polymer film by scanning-force microscopy and surface spectroscopyPolymer, 1998
- Interface and chain confinement effects on the glass transition temperature of thin polymer filmsPhysical Review E, 1997
- Effect of Polydispersity on Surface Molecular Motion of Polystyrene FilmsMacromolecules, 1997
- Interface and Surface Effects on the Glass Transition in Thin Polystyrene FilmsPhysical Review Letters, 1997
- The Physics of PolymersPublished by Springer Nature ,1996
- Glass Transition Behavior in Ultra‐Thin Polystyrene FilmsIsrael Journal of Chemistry, 1995
- Size-Dependent Depression of the Glass Transition Temperature in Polymer FilmsEurophysics Letters, 1994
- Interface and surface effects on the glass-transition temperature in thin polymer filmsFaraday Discussions, 1994
- Molecular dynamics simulation of a glassy polymer surfaceMacromolecules, 1991