Physical Review Letters
Chain Molecules, Normal Alkanes, Surface, Diffraction, Interfaces
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 10degreesC 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.
Gautam, Keshav S.; Kumar, Satyendra; Wermeille, Didier; Robinson, Doug; and Dhinojwala, Ali (2003). Observation of Novel Liquid-Crystalline Phase Above the Bulk-Melting Temperature. Physical Review Letters 90(21). doi: 10.1103/PhysRevLett.90.215501 Retrieved from http://digitalcommons.kent.edu/phypubs/48