Relaxation dynamics in confined glasses

Confining a system between two walls or in pores changes its static and dyn amic properties. In glass-forming materials, confinement has a strong effec t on dynamic properties and, in particular, on the glass transition tempera ture of the system. In the recent years, numerous studies have been perform ed on confinement effects in amorphous polymers and small organic glass-for mers. This article makes a review of the progress achieved experimentally i n this field, outlining the questions that are still controversial.