Two Relaxation Mechanisms for Rejuvenation of Stable Polystyrene Glass

We report on the rejuvenation of thin films of polystyrene (PS) as they are heated from stable glassy states, prepared either through vapor deposition or physical aging. For films with thicknesses h ≳ 200 nm and h ≲ 50 nm, the rejuvenation of vapor-deposited stable PS glass films is quantitatively described with zero free parameters by simulations using parameters previously obtained from isothermal rejuvenation measurements in the same …