There has been a great deal of interest in the electro-optical properties of composite systems consisting of side chain type liquid crystalline polymer (SCLCP) and low molecular weight liquid crystal (LMWLC). Adding a photoisomerizable molecule to the composite systems gives a rewritable optical storage effect. This paper will focus on two experimental results; 1) to strengthen the aggregation of the ternary system by developing an induced smectic component system in order to realize a high contrast and improved memory characteristics, 2) to achieve fast optical write by using the third harmonic of a YAG laser. Poly[[6-[4-[(4-methoxyphenyl)oxycarbonyl]phenoxy]hexyl]methylsiloxane] (PS6EM), 4-butyl- (4-methoxyphenylazo) benzene (MPABB) and 4-cyano-4′-pentyloxybiphenyl (50CB) were used as the SCLCP, photoisomerizable molecule with weak polar end and the LMWLC with strong polar end, respectively. The PS6EM/MPABB/50CB (40/10/50mol%) composite system revealed a reading contrast ratio of 300. Optical write time was reduced from over 10 min to few seconds by using the YAG laser with a Q-SW (Continuun, NY-60).
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)