Fluctuation-entanglement mechanism for director anchoring at nematic polymer surfaces

Autor:	F. N. Braun, C. Viney
Rok vydání:	2000
Předmět:	Condensed Matter::Soft Condensed Matter Physics chemistry.chemical_classification Surface tension Magnetic anisotropy chemistry Condensed matter physics Liquid crystal Anchoring Quantum entanglement Polymer Deformation (engineering) Elasticity (economics)
Zdroj:	Physical review. E, Statistical, nonlinear, and soft matter physics. 63(3 Pt 1)
ISSN:	1539-3755
Popis:	The existence of polymeric entanglements in a polymer nematic liquid crystal modifies the Frank elastic description governing director deformation. We present a calculation of the director fluctuation contribution to polymer nematic surface tension, in which we supplement the usual Frank terms with a damping term due to entanglements. We infer an effective surface anchoring potential, going to zero as n ln n in the limit of low entanglement density n. The anchoring easy axis depends on the relative magnitudes of the Frank constants governing director elasticity. We comment on generalizing the approach to take into account polydomain structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b52b8f54f6a465f16b14ef15ea7ed00 https://pubmed.ncbi.nlm.nih.gov/11308667 Zobrazit plný text záznamu