本研究對對掌型側鏈基層列C型液晶高分子作不同溫度下的流變測試。由穩態測試及動態測試可得知此類物質在層列C*型的液晶相範圍內，穩態剪黏度和動態模數的變化值隨溫度增加而減少。我們也發現此類液晶高分子的動態模數曲線會隨液晶相之相轉移而有曲線的轉折變化。且在液晶相為層列C*型的溫度範圍內，我們可將已得到的動態模數數據統合成一個簡單的指數函數方程式。我們也觀察了其暫態突峰值及穩定時間在各相中的情形。 此外，我們也探討了此類液晶高分子在直流電場下的行為。由實驗結果我們發現到在低電場強度及低溫時，物質的動態模數幾乎不變。但當在較高溫度及高電場強度時，G'會有稍為明顯的增加但G"則否。而穩態測試的結果顯示剪黏度值會隨電場強度先降後緩升，尤其在45℃下及1142V/mm的電場強度下時，我們可得到較無電場影響下約六倍大的剪黏度變化值。 The rheology behavior of three different chiral smectic C side chain liquid crystal polymers (CScSCLCP) was investigated. The shear viscosities and dynamic moduli of these liquid crystals were found temperature dependent from the results of our experiments. Over the temperature range of smectic C phase, we found all dynamic moduli including G'、G"、complex viscosities decrease as temperature increases. We also found phase transitions of liquid crystals can be characterized by the sharp of the curve of dynamic moduli vs temperature. A simple model was suggested to describe the dynamic behavior. We also observed transient behavior of two different liquid crystal polymers in different phases. The height of overshoot and the time required to achieve steady state were investigated. Beside, the electrorheological effect of these polymers were also investigated. We observed dynamic and steady state behavior under four different electric field strengths. From the results , we found dynamic moduli rarely changed with increasing electric field under low DC fields and low temperature. While under high DC field and high temperature , G' apparently increased and G" only slightly changed. From steady tests, we found shear viscosity first decreased with DC field strength and then increased slowly. Shear viscosity was found to increase about six times more than the value under no field at 45℃ and 1142V/mm DC field.
