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作者等使用一种全部由玻璃制成的管形渗透计,半透膜用硝化纤维素溶液涂在熔结玻璃筒的外面,经脱硝基处理后使用。玻璃筒内置溶剂,筒外置溶液。这种渗透计构造简单,操作简便,特别适合于对混合溶剂、粘度大的溶液和在几个温度下的渗透压测量。聚甲基丙烯酸甲酯一个级份(M_n=6.3×10~5)在甲苯-乙醇溶液里的渗透压和粘度数据(25°)指示γ=0.17(沉淀剂的体积分数)时A_2和[η]都呈现最大值。各溶液的粘度都微有切变速度依赖性,与牛顿流动的偏差亦在γ=0.17附近最大。在C=1×10~(-3)克/厘米~3时的沉淀点γ=0.68_2。
The authors used a tube-shaped penetrometer made entirely of glass. The semipermeable membrane was coated with a nitrocellulose solution on the outside of the frit glass tube and was used after being denitrified. Glass tube built-in solvent, cartridge external solution. This simple construction of the osmometer, easy to operate, especially suitable for mixed solvents, viscous solutions and at several temperatures under the osmotic pressure measurement. The tonicity and viscosity data (25 °) of one fraction of polymethylmethacrylate (M_n = 6.3x10 ~ 5) in toluene-ethanol solution indicates A_2 and [η ] Have the maximum value. The viscosities of each solution are slightly shear-rate-dependent, and the deviation from the Newtonian flow is also greatest around γ = 0.17. The precipitation point γ = 0.68_2 when C = 1 × 10 ~ (-3) g / cm ~ 3.