To tilt or not to tilt? Kinetics of structure formation in a discotic liquid crystal
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Grigoriadis, C.
Haase, N.
Butt, H. J.
Mullen, K.
Floudas, G.
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peer reviewed
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Soft Matter
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The distinctly different unit cells, dipolar dynamics and viscoelastic properties of the two columnar phases in a dipole-functionalized discotic liquid crystal (mono-iodine hexa-peri-hexabenzocoronene) were employed as fingerprints and allowed investigating the kinetic pathways towards formation of the crystalline phase. X-Ray scattering, dielectric spectroscopy and rheology revealed a nucleation and growth process. The transformation involved coexisting unit cells composed from columns with either tilted or non-tilted disks and the absence of intermediate states. The transition can be described as a transformation from a structurally weakly ordered but dipolar well-ordered liquid crystalline phase to a structurally well-ordered but dipolar disordered crystalline phase.
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dielectric-spectroscopy, molecular-dynamics, glass-transition, solid-state, crystallization, hexabenzocoronene, relaxation, copolymer, polymers, rheology
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<Go to ISI>://000290227400016
http://pubs.rsc.org/en/Content/ArticleLanding/2011/SM/c1sm05188a
http://pubs.rsc.org/en/Content/ArticleLanding/2011/SM/c1sm05188a
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en
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Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών