用吊环和∏型金属框拉膜测量液体表面张力系数的讨论

Discussion on Liquid Surface Tension Coefficient Measured by Rings and Π-type Metal Frame

为了讨论拉脱法测量液体表面张力时用吊环和用∏型金属框拉膜的测量结果,在不同温度下分别对纯净水、乙醇和甘油三种常见液体的表面张力系数进行了测量,得出了吊环和∏型金属框各有优点,但用吊环测量的数据稳定性要优于∏型金属框。

In order to compare rings with Π-type metal frame,the surface tension coefficients of pure water,ethanol,glycerine are measured at different temperatures.It is obtained that rings or Π-type metal frame has its own advantages,but the stability of measuring data with the rings is better than Π-type metal frame.