本系列以siloxane為主鍊的強誘電性側鏈高分子液晶,其誘電緩和 測量範圍從0.1至1000000Hz, B 緩和運動在此來做研究比較,發現側鏈液 晶基的含量對誘電緩和具有很大的影響, 接著測試複合系液晶的三種光電 效應,在極薄的液晶元件中的表面雙安定效應(SSFLC), 以短暫的反轉電流 來達到過渡光散亂效應(TSM) 與利用階段電壓來形成扭轉螺旋效應(DHS), 希望藉由光電實驗來尋求液晶元件的記憶效果 , 本實驗發現位對於低分 子液晶在SSFLC中, 利用偏壓可得到良好的明暗比, 並藉著混入高分子液 晶來達到良好的雙安定性; 而複合系液晶可使用TSM與DHS來達到極佳的明 暗比與應答時間, 且獲得良好的雙安定性.
A series of ferroelectric side chain liquid crystalline polymers ( FLCPs ) with siloxane backbone were synthesized in this study. The dynamics of these polymers was studied by broad-band dielectrics spectroscopy ( 0.1 to 1000000 Hz ). The B relaxation processes were compared here. Three types of electrooptic effects, a surface stablized ferroelectric liquid crystal ( SSFLC ) at a thin film cell, a transient scattering mode ( TSM ) effect at the instant of polarity reversal of applied voltage and a deformation of thelical structure ( DHS ) effect upon applying stepwise voltage in FLCP / FLC mixtures have been studied. From these experiments we can get great contrast, quick response time and bistable effects.