Observation of Novel Smectic-Like Phase Above the Bulk Melting Temperature
In this paper, we show that a noncrystalline but ordered smectic-like phase exists above the bulk-melting temperature (T(m)) at poly(n-alkyl acrylates)-air interface. The surface ordered phase is one monolayer thick and undergoes a sharp transition from order to disorder 10 degrees C above T(m) for n=22. The presence of a surface phase that does not exist in the bulk has important implications in the design of thermally responsive adhesives.
Physical Review Letters
Gautam, Keshav S.; Kumar, Satyendra; Wermeille, Didier; Robinson, Doug; and Dhinojwala, Ali, "Observation of Novel Smectic-Like Phase Above the Bulk Melting Temperature" (2003). Polymer Science Faculty Research. 60.