【摘要】 <正> 甲酸-水二元混合液的粘度已有研究.最近??称粘度组成曲线在甲酸水的克分子比1∶1和1∶2处出现平台,认为是存在两种甲酸-水分子化合物.在早期工作中无此现象,因此作者重新测量甲酸-水体系在25°时的粘度. 粘度测量使用Tsuda式水平粘度计.因为水平粘度计的驱动压力是外加恒压,粘度直接正比于外压与流过时间的乘积,不需要象用一般粘度计时另外测定液体密度再从比密粘度计算,从而消除密度测定所引起的误差.其次,??的实验结果与前人的差更多还原

【Abstract】 The viscosities of the binary mixtures of formic acid-water were measured at 25°with horizontal viscometer under applied pressure. The viscosity increases continuously with increasing concentration of formic acid. The two platforms in the viscosity-composition curve at mole ratios 1∶1 and 1∶2 observed by Glagoleva have not been confirmed. For mixtures with formic acid concentration between 55 and 90%, the viscosity varies linearly with the weight fraction of formic acid and can be expressed as η²⁵（cps）=0.633+1.007W. This relationship could be used for determining the concentration of formic acid viscosimetrically.更多还原