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.
Physical Review Letters
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Copyright 2003 American Physical Society. The original published version of this article may be found at http://dx.doi.org/10.1103/PhysRevLett.90.215501.
Gautam, Keshav S.; Kumar, Satyendra; Wermeille, Didier; Robinson, Doug; and Dhinojwala, Ali, "Observation of Novel Liquid-Crystalline Phase Above the Bulk-Melting Temperature" (2003). College of Polymer Science and Polymer Engineering. 25.