A surface-controlled cooperatively rearranging region (SCC) model mimics the segmental dynamics of supercooled liquids. By introducing surface/interface effects into the SCC model, the size-dependent dynamics of nanosized polymer materials with various geometries were predicted. The calculated glass transition temperature (Tg) and fragility for filled spheres of polystyrene coincided qualitatively with experimental observations. The results also showed that Tg(filled sphere) > Tg(filled fiber) > Tg(free-standing film) when compared at the same surface area to volume ratio, whereas for fragility, the opposite trend was found.
- Tatsuki Nakane
- Yuya Tsuzuki
- Takashi Sasaki
