In this report, we use ellipsometry to characterize the glass transition in ultra-thin films of poly
(2-vinyl pyridine)(P2VP) supported on a silicon substrate. P2VP is known to have attractive …

We use fluorescence from dye-labelled polymer to measure the glass transition
temperatures (Tgs) across single-layer films and near surfaces and silica interfaces in …

Optical waveguide spectroscopy has been employed to monitor the temperature
dependence of the refractive index, k=∂ n/∂ T, and of the thermal (linear) expansivity, ß=(∂ …

Monodisperse polystyrene (PS) films with various thicknesses were spun-coated on silicon
wafers with native oxide layer. Surface relaxation behavior in the PS films was studied as a …

Nowadays there is much interest in thin polymer films due to their importance in science and
technology. 1 Studies on Tg in thin polymer films have revealed that it is dependent on film …

We have investigated the dynamics of polymer films, free of physical constraints, floating on
the surface of an ionic liquid (IL) to minimize substrate− polymer interactions and constraints …

Thin amorphous poly (ethylene terephthalate)(PET) films covered with/without a crystallized
surface layer were prepared onto silicon wafers. In the former and latter cases, the surface …

The effect of free surfaces on the glass transition temperature (T g) of thin polystyrene films
was studied. Measurements were performed on films (8 nm< h< 290 nm) with one free …

The surface relaxation dynamics of supported star-shaped polymer thin films are shown to
be slower than the bulk, persisting up to temperatures at least 50 K above the bulk glass …

Large increases of mobility of local segmental relaxation observed in polymer films as the
film thickness is decreased, as evidenced by decreases of the glass temperature, are not …