Molecular dynamics polystyrene films

Akabori K, Tanaka K, Nagamura T, Takahaia A, Kajiyama T (2005) Molecular motion in ultrathin polystyrene films dynamic mechanical analysis of surface and interfacial effects. 

Tanaka K, Taura A, Ge SR, Takahara A, Kajiyama T. Molecular weight dependence of surface dynamic viscoelastic properties for the monodisperse polystyrene film. Macromolecules 1996 29 3040-3042. 

Yin, H., Cangialosi, D., Schoenhals, A. Glass transition and segmental dynamics in thin supported polystyrene films the role of molecular weight and annealing. Thermochim. Acta 566, 186-192 (2013)... 

DIRLD data used for the 2D correlation analysis was obtained by applying a 23-Hz dynamic strain with an amplitude of 0.1 Xi to a thin solution-cast film of atactic polystyrene (M 150,000) at room temperature [39]. The resulting dynamic dichro-ism spectra have already been shown in Figures 1-5 and 1-6. The time-dependent reorientations of transition dipoles associated with the molecular vibrations of backbone and side groups are all observable in the original dynamic dichroism spectra. However, much more detailed features are recognized in the 2D correlation spectrum. 

Such phase-separated polymer mixtures serve as an excellent model system where molecular-level interactions between components are small. The system studied here is a film made of an immiscible binary mixture of atactic polystyrene and low-density polyethylene [2], The dynamic IR measurement was carried out as before by mechanically stimulating the system at room temperature with a 23-Hz dynamic tensile strain with an amplitude of 0.r/>. The time-dependent fluctuations of IR absorbance induced by the strain were recorded at a spectral resolution of 4 cm. ... 

---