Sandwich Structure Containing Liquid Crystal Polymer Grafted on Polymer Support

Surface Modification of Fluoropolymers via Molecular Design

“…VUV irradiation±induced graft copolymerization of a mesogen-containing monomer on fluoropolymers has been carried out during the preparation of an isotropic liquid-crystal layer. [134] The thus-modified structure consisted of a fluorinecontaining substrate layer, which provided good physico-mechanical properties, and a graft layer, which exhibited the usual features of a nematic liquid crystal. The synthesis and application of ozone-pretreated PVDF with surface graftcopolymerized AAc, glycidyl methacrylate (GMA), and methyl methacrylate (MMA) have been reported.…”

Liquid Crystal Polymer Brush with Hydrogen Bonds: Structure and Orientation Behavior

“…Surface treatment and modification techniques include plasma polymerization, ion-beam-assisted deposition, and surface grafting . During the past 10 years vacuum-ultraviolet (VUV)-assisted modification of polymer surface has been successfully applied for creating environmentally friendly and biologically active surfaces and surfaces with controlled orientability. , The latter is considered to be particularly useful for modification of permeability properties and sensing of target molecules. It is especially effective in the case of fluorine-containing polymers.…”

Orientational order of a nematic polymer grafted on polytetrafluoroethylene

“…The temperature 160°C was chosen to keep the LC grafted polymer in the isotropic state during the elongation (the temperature of the nematic-isotropic transition T c = 124°C [1]). After the elongation up to a certain strain samples were released, allowed to relax at 160°C for 10 min, and then cooled down to 20°C.…”

“…To combine the main advantages of LC media and polymer materials one can use a graft polymerization approach. It has been shown that the latter may be achieved by post-polymerization of the mesogene-containing monomer on the vacuum ultraviolet (VUV) preirradiated surface of the polymer film [1,2]. Fluorocarbon polymers like polytetrafluoroethylene (PTFE) and FEP are the most appropriate for such a purpose.…”

“…Technol. 11, 330±333 (2000) fluorine-containing polymers to initiate the grafting after VUV irradiation [1,2]. The nematic polymer formed by graft polymerization contains cyanobiphenyl mesogenic groups which are known to show orientation under the action of external fields like electric and magnetic fields as well as mechanical stress [4,5].…”