Liquid crystal polymers networks

A new class of liquid crystal/polymer network composite with very small amounts of polymer network (3 Wt%) is described. These composites are formed by photopolymerization of the monomers in-situ from a solution of monomer dissolved in low-molar-mass liquid crystals. Several techniques have proven useful to characterize these polymer networks. This review describes polymer network structure and its influence on electro-optic behavior of liquid crystals. Structural formation in these composites begins with the phase separation of polymer micronetworks, which aggregate initially by reaction-limited, and then by diffusion-limited modes. The morphology can be manipulated advantageously by controlling the crossover condition between such modes, the order of the monomer solution prior to photopolymerization, and the molecular structure of monomers or comonomers. [Pg.507]

RAJARAM ET AL. Liquid Crystal-Polymer Network Composites... [Pg.509]

Electro-Optic Properties of Polymer Stabilized Liquid Crystals. Polymer networks have been used to stabilize many of the liquid crystal display states in various types of displays quite advantageously. In this section, we present some recent work on correlating the material properties of the liquid crystal/polymer network composite to the electro-optic properties of the flat-panel displays specifically cholesteric texture displays (75) and simple nematic birefringent type displays (7(5). [Pg.529]

It is shown that the problem of formulating the statistical thermodynamics of networks can be resolved by the use of ideas from quantum statistical mechanics by appropriate generalization. Examples are given in terms of gaussian and liquid crystal polymer networks. [Pg.269]

Some Properties of Liquid-Crystal Polymer Networks... [Pg.159]

Since there is clear evidence of nematicity in main-chain liquid crystal polymer networks from their quiescent birefringence, this term must be studied. [Pg.163]

Iqbal, D., SamiuUah, M.H. Photo-responsive shape-memoiy and shape-changing liquid-crystal polymer networks. Materials (Basel) 6(1), 116-142 (2013)... [Pg.286]

Solid-state NMR measurements of F fluorinated side-chain Azobenzene liquid crystal polymer networks (azo-LCNs) using an in situ visible light... [Pg.461]

Tsoi, W.C., et al. Distributed bUayer photovoltaics based on nematic liquid crystal polymer networks. Chem. Mater. 19(23), 5475-5484 (2007)... [Pg.171]

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