Canada's national laboratory for particle and nuclear physics
Laboratoire national canadien pour la recherche en physique nucléaire et en physique des particules

Title of Experiment

Depth, temperature and molecular weight dependence of dynamics in polystyrene thin films

Spokesperson(s) for Group

• J.A. Forrest
• I. McKenzie

Safety Coordinator(s) for Group

• I. McKenzie

Current Members of Group

Name	Institution	Status	% of research time devoted to experiment
J.A. Forrest	University of Waterloo	Professor
I. McKenzie	TRIUMF	Research Scientist
A.N. Raegen	University of Waterloo	PDF

Abstract

Beta-NMR will be used to determine how dynamics in polystyrene thin films varies with depth, temperature and molecular weight. Measurements will be performed to confirm enthalpy-entropy compensation both near the free surface and in the bulk. A highly monodisperse low molecular weight sample with bulk Tg ~ 300 K will be studied to determine how Tg varies with depth.