000056247 001__ 56247
000056247 005__ 20210121114520.0
000056247 0247_ $$2doi$$a10.3390/ma8063334
000056247 0248_ $$2sideral$$a90676
000056247 037__ $$aART-2015-90676
000056247 041__ $$aeng
000056247 100__ $$aDiez-Berart, Sergio
000056247 245__ $$aTwo glass transitions associated to different dynamic disorders in the nematic glassy state of a non-symmetric liquid crystal dimer dopped with gamma-alumina nanoparticles
000056247 260__ $$c2015
000056247 5060_ $$aAccess copy available to the general public$$fUnrestricted
000056247 5203_ $$aIn the present work, the nematic glassy state of the non-symmetric LC dimer a-(4-cyanobiphenyl-4'-yloxy)-¿-(1-pyrenimine-benzylidene-4'-oxy) undecane is studied by means of calorimetric and dielectric measurements. The most striking result of the work is the presence of two different glass transition temperatures: one due to the freezing of the flip-flop motions of the bulkier unit of the dimer and the other, at a lower temperature, related to the freezing of the flip-flop and precessional motions of the cyanobiphenyl unit. This result shows the fact that glass transition is the consequence of the freezing of one or more coupled dynamic disorders and not of the disordered phase itself. In order to avoid crystallization when the bulk sample is cooled down, the LC dimer has been confined via
the dispersion of ¿-alumina nanoparticles, in several concentrations.
000056247 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E04$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38538-C01-02
000056247 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000056247 590__ $$a2.728$$b2015
000056247 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b63 / 271 = 0.232$$c2015$$dQ1$$eT1
000056247 592__ $$a0.83$$b2015
000056247 593__ $$aMaterials Science (miscellaneous)$$c2015$$dQ1
000056247 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000056247 700__ $$aLópez, David.O.
000056247 700__ $$aSalud, Josep
000056247 700__ $$aDiego, José Antonio
000056247 700__ $$aSellarés, Jordi
000056247 700__ $$aRobles-Hernández, Beatriz
000056247 700__ $$aDe la Fuente, M.Rosario
000056247 700__ $$0(orcid)0000-0003-4416-1036$$aRos, M.Blanca$$uUniversidad de Zaragoza
000056247 7102_ $$12013$$2765$$aUniversidad de Zaragoza$$bDpto. Química Orgánica$$cÁrea Química Orgánica
000056247 773__ $$g8, 6 (2015), 3334-3351$$pMATERIALS$$tMATERIALS$$x1996-1944
000056247 8564_ $$s856565$$uhttps://zaguan.unizar.es/record/56247/files/texto_completo.pdf$$yVersión publicada
000056247 8564_ $$s94069$$uhttps://zaguan.unizar.es/record/56247/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000056247 909CO $$ooai:zaguan.unizar.es:56247$$particulos$$pdriver
000056247 951__ $$a2021-01-21-11:02:13
000056247 980__ $$aARTICLE