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Volumetric study of n-octyloxy-cyanobiphenyl (8OCB)

Volumetric study of n-octyloxy-cyanobiphenyl (8OCB)

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dc.contributor.author Roland, C. Michael pl
dc.contributor.author Fragiadakis, Daniel pl
dc.contributor.author Roy, Debjani pl
dc.contributor.author Urban, Stanisław [SAP11003659] pl
dc.date.accessioned 2015-05-19T08:08:27Z
dc.date.available 2015-05-19T08:08:27Z
dc.date.issued 2014 pl
dc.identifier.issn 0267-8292 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/7374
dc.language eng pl
dc.rights Dodaję tylko opis bibliograficzny *
dc.rights.uri *
dc.title Volumetric study of n-octyloxy-cyanobiphenyl (8OCB) pl
dc.type JournalArticle pl
dc.description.physical 9-14 pl
dc.abstract.en Volumetric measurements were carried out on n-octyloxy-cyanobiphenyl \left ( 80CB \right ) over temperatures from ambient to 150^{\circ}C at pressures up to 200 MPa, encompassing the liquid, nematic and smectic liquid crystalline, and crystal states. From the step changes in volume at the transitions, the phase boundaries and the associated activation enthalpies and energies were determined. The results are consistent with prior studies that were limited to a narrower range of thermodynamic conditions. The thermodynamic potential parameter, \Gamma , found for the isotropic–nematic transition, =3.15, is significantly smaller than the scaling exponent \gamma \left ( =4.4 \right ) that superposes the longitudinal relaxation times in the nematic state. From this non-equivalence, we conclude that the order parameter must vary with pressure along the clearing line. By comparing the phase behaviour of the nematic state for isochoric and isobaric conditions, the relative contribution of volume was determined to be less that the effect of thermal energy on the thermodynamic stability. pl
dc.subject.en specific volume pl
dc.subject.en high pressure pl
dc.subject.en interaction potential pl
dc.subject.en 8OCB pl
dc.description.volume 41 pl
dc.description.number 1 pl
dc.identifier.doi 10.1080/02678292.2013.828332 pl
dc.identifier.eissn 1366-5855 pl
dc.title.journal Liquid Crystals pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego pl
dc.subtype Article pl
dc.rights.original bez licencji pl
.pointsMNiSW [2014 A]: 25


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