期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 19, 期 2, 页码 961-965出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp07139b
关键词
-
资金
- University of the Basque Country
- Basque Country Government [IT-654-13 (GV)]
- Depto. Educacion, Universidades e investigacion
- Spanish Government [MAT2015-63704-P]
- Spanish Government (MINECO/FEDER, UE)
Searching for the ideal glass transition, we exploit the ability of glassy polymer films to explore low energy states in remarkably short time scales. We use 30 nm thick polystyrene (PS) films, which in the super-cooled state basically display the bulk polymer equilibrium thermodynamics and dynamics. We show that in the glassy state, this system exhibits two mechanisms of equilibrium recovery. The faster one, active well below the kinetic glass transition temperature (T-g), allows massive enthalpy recovery. This implies that the 'fictive' temperature (T-f) reaches values as low as the predicted Kauzmann temperature (T-K) for PS. Once the thermodynamic state corresponding to T-f = T-K is reached, no further decrease of enthalpy is observed. This is interpreted as a signature of the ideal glass transition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据