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Abstract
Liquid crystal (LC) polymers [CH 2 CH(COOR)] n (R= (CH 2 ) 3 OPhCOOPhOCH 3 , (CH 2 ) 3 PhPhCN) doped with azobenzene derivatived and LC copolymers [CH 2 CH(COOR)] x [CH 2 CH(COOR')] y (R= (CH 2 ) 3 OPhCOOPhOCH 3 ) were studied. Using a nanosecond pulsed laser, it was found that the relaxation time required for the nematic (N) to isotropic (I) phase transition was in a time range of 10 (copolymer)-100 ms (homopolymer doped with azobenzene) at T/T NN = 0.999, which was comparable to that of low molecular weight LC. Effects of temperature, laser power and structure of guest molecule were discussed
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