RELAXATION-TIME OF POLYMER BALL TYPE PDLC FILMS

'Polymer ball' polymer dispersed liquid crystal (PDLC) samples were fa bricated by the photopolymerization induced phase separation method an d their relaxation behaviour was studied. It was found that upon remov al of the applied electric field, the transmittance of the 'polymer ba ll' PDLC sample decays exponentially from T-on to T-memo with a relaxa tion time constant in the order of msec. It was found that the measure d relaxation time constant decreases as the curing time increases and the LC concentration increases.