Premelting features and acoustic mode softening in the rotator phases of linear telomers: C17H36

Autor:	R. Jiménez, C. Grammes, Patrick Alnot, M. Prechtl, Jan-Kristian Krüger
Rok vydání:	1994
Předmět:	chemistry.chemical_classification Condensed matter physics business.industry Elastic tensor Polymer Condensed Matter Physics Premelting Brillouin zone Optics chemistry General Materials Science business Softening Stiffness matrix
Zdroj:	Journal of Physics: Condensed Matter. 6:10977-10988
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/6/50/008
Popis:	The polymer induced alignment (PIA) technique is presented as a new technique to grow single-crystalline films of linear telomers. Combining the PIA technique with special high-resolution Brillouin techniques, it is possible to determine the coefficients of the elastic stiffness tensor of the crystalline state of linear telomers. Especially in their rotator phases. As model systems we have chosen the perfluoroalkane C20F42 and the linear n-alkane C17H36. A comparison of elastic data obtained from classically and PIA grown samples proves their equivalence as well as their complementarity. Precursors of critical melting discovered in the rotator phase of C17H36. are discussed in terms of the anomalous temperature dependence of certain elastic tensor coefficients and of related n-telomers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cdb6c6015b5bf5f464f79572b3b54571 https://doi.org/10.1088/0953-8984/6/50/008 Zobrazit plný text záznamu