Molecularly doped liquid crystalline polymer

Molecularlv Doped Thermotropic Liquid Crystalline Polymer. The idea of the nonlinear optical medium which is the subject of this paper results from a synthesis of the ideas of the discussion above and a few concepts from nonlinear optical molecular and crystal physics. As discusssed several places in this volume, it is known that certain classes of molecules exhibit tremendously enhanced second-order... 

An earlier study of the molecularly doped polymer liquid crystalline system shown in Figure 6.9 revealed more complex behavior (27, 32). In this study, the amount of induced nonlinearity was path dependent, with the largest observed value occurring when poling was done near Tg ( 25 C). The host polymer exhibits a nematic-to-isotropic transition at = 100 C and a nematic texture between Tg and. Poling at 50 C produces a decrease in approximately 1 order of magnitude. The l/T dependence... 

To explain the unusually high conductivity of these polyblends of polyaniline Min et al. [112,113] have suggested secondary doping, which has been defined as an inert substance (vapour or liquid) which promotes the conductivity of an already doped form of the conducting polymers. These may also induce molecular conformational changes to reduce conjugation defects resulting in increased intramolecular conductivity and may also enhance crystallinity. It has been observed that in the absence of w-cresol the conductivity of camphor sulphonic acid-doped polyaniline film is... 

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