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研究以聚硅氧烷侧链高分子液晶作为分散相 ,制备均相的电流变流体 (ER流体 ) ,测试其在电场下表观粘度、剪切应力等流变学性质的变化。结果发现 :以硅油作分散介质 ,含6 6 7%的高分子液晶的流体 ,在剪切速率为 30 0s- 1时 ,电场强度 (E)从 0升至 2kV/mm ,流体的剪切应力从 2 0 0Pa·s上升至 540 0Pa·s ,表观粘度由 2 0 0 0mPa·s上升至 10 0 0 0mPa·s ,并且 ,流体在80℃时仍有很强的电流变效应 ,能在较宽的温度范围内使用
In this paper, a homogeneous liquid ER was prepared by using polysiloxane side chain polymer liquid crystal as the disperse phase. The rheological properties such as apparent viscosity and shear stress under electric field were tested. The results show that the electric field strength (E) increases from 0 to 2 kV / mm at a shear rate of 30 0 s-1 for a fluid containing 6 6 7% of polymer liquid crystal with silicone oil as the dispersion medium. The shear stress From 200 Pa · s to 540 Pa · s, the apparent viscosity increased from 2000mPa · s to 10 000mPa · s, and the fluid still had strong electrorheological effect at 80 ℃, Wide temperature range used