Surface and Bulk Relaxation of Vapour-Deposited Polystyrene Glasses - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Chemical Physics Année : 2023

Surface and Bulk Relaxation of Vapour-Deposited Polystyrene Glasses

Junjie Yin
  • Fonction : Auteur
  • PersonId : 1183400
Michael Thees
  • Fonction : Auteur
  • PersonId : 1183401
Thomas Salez

Résumé

We have studied the liquid-like response of the surface of vapour-deposited glassy films of polystyrene to the introduction of gold nanoparticles on the surface. The build-up of polymer material was measured as a function of time and temperature for both as-deposited films, as well as films that have been rejuvenated to become normal glasses cooled from the equilibrium liquid. The temporal evolution of the surface profile is well described by the characteristic power law of capillary-driven surface flows. In all cases, the surface evolution of the as-deposited films and the rejuvenated films are enhanced compared to bulk and are not easily distinguishable from each other. The temperature dependence of the measured relaxation times determined from the surface evolution is found to be quantitatively comparable to similar studies for high molecular weight spincast polystyrene. Comparisons to numerical solutions of the glassy thin film equation provide quantitative estimates of the surface mobility. For temperatures sufficiently close to the glass-transition temperature, particle embedding is also measured and used as a probe of bulk dynamics, and in particular bulk viscosity.
Fichier principal
Vignette du fichier
main.pdf (1.67 Mo) Télécharger le fichier
supp.pdf (153.61 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03843477 , version 1 (08-11-2022)

Identifiants

Citer

Junjie Yin, Christian Pedersen, Michael Thees, Andreas Carlson, Thomas Salez, et al.. Surface and Bulk Relaxation of Vapour-Deposited Polystyrene Glasses. Journal of Chemical Physics, 2023, 158, pp.094901. ⟨hal-03843477⟩

Collections

CNRS LOMA ANR
34 Consultations
25 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More