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Two glass transitions associated to different dynamic disorders in the nematic glassy state of a non-symmetric liquid crystal dimer dopped with gamma-alumina nanoparticles

Autor
Diez, S.; Lopez, D.; Salud, J.; Diego, J.; Sellarès, J.; Robles-Hernández, B.; de la Fuente, M.; Blanca Ros, M.
Tipus d'activitat
Article en revista
Revista
Materials
Data de publicació
2015-06-01
Volum
8
Número
6
Pàgina inicial
3334
Pàgina final
3351
DOI
https://doi.org/10.3390/ma8063334 Obrir en finestra nova
Repositori
http://hdl.handle.net/2117/76783 Obrir en finestra nova
Resum
In the present work, the nematic glassy state of the non-symmetric LC dimer -(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 o...
Citació
Diez, S., Lopez, D., Salud, J., Diego, J., Sellarès, J., Robles-Hernández, B., De la Fuente, M., Blanca Ros, M. Two glass transitions associated to different dynamic disorders in the nematic glassy state of a non-symmetric liquid crystal dimer dopped with gamma-alumina nanoparticles. "Materials", 01 Juny 2015, núm. 6, p. 3334-3351.
Paraules clau
Confinement, Dielectric spectroscopy, Dimer, Glass transition, Liquid crystal, Modulated differential scanning calorimetry (MDSC), Nanoparticles, Thermally stimulated depolarization currents
Grup de recerca
DILAB - Laboratori de física dels materials dielèctrics

Participants

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