Design and synthesis of new fluorinated ferroelectric liquid-crystalline polymers

Acrylic monomers and polymers with perfluoroalkylated biphenyl side groups: synthesis and phase transitions

“…The solvent was evaporated under vacuum and the crude product (powder) was washed twice with distilled water. 4-(Acryloyloxy), 4 0 -(3-perfluorooctylprop-1-yloxy)-biphenyl (11) was obtained in a 82% yield. 1 …”

“…The ability of substituted biphenyl cores to initiate self-organization in comb-shaped liquid crystal polyacrylates [6] could be used to enhance the cohesion between the perfluorinated groups at the polymer interface. Some papers have been devoted to the synthesis of perfluoroalkylated acrylic monomers and polymers with a mesogenic core, mainly constituted by Schiff bases [5,[11][12][13][14][15]. Perfluorinated groups used to enhance the liquid crystal character of biphenyl molecules were localized in the side chain [16,17] or as a terminal branched group [18].…”

Studies on the synthesis and properties of ferroelectric side chain liquid crystalline polyoxetanes

“…Therefore, the phase transition listed in time of side chain liquid crystalline polymers have Tables VI and VII were according to the observabeen investigated only in a few sources. 14,15 Howtion under a thermal optical polarizing microever, no regular dependence of the spacer length scope. After polymerization, all of the polyoxeon the response time could be found in this study.…”

Molecular Dynamics of Liquid-Crystalline Side-Group Polymers with Fluorine-Containing Azobenzene Chromophores

“…Dielectric measurements on liquid-crystalline polymethacrylates with 4'-trifluoromethoxy-azobenzene mesogenic side groups and alkylene spacers of varying length (2)(3)(4)(5)(6) are reported. Several relaxation regions have been identified.…”

“…This is especially true for systems having azobenzene-chromophores in the mesogenic unit because the properties (shape and dipole moment) can be changed by irradiation via a trans-cis isomerization process. Moreover, in recent years increasing attention is paid to fluorine-containing liquid crystals because enhancement of properties such as favorable mesophase behavior, low viscosity, high thermal stability, and high polarity is expected (2)(3)(4)(5)(6).…”