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为了适应国际上《蒙特利尔议定书》即将禁用ＣＦＣ与ＨＣＦＣ类物质的紧迫要求，寻求它们的替代物成了当务之急。ＨＦＣ－１２５是迄今为止所有用以替代ＨＣＦＣ－２２的混合工质中必不可少的一种组份，而其物性研究还十分欠缺，特别是它的表面张力研究尤为少见。因此本文发表了在２３３．１５～３３３．１５Ｋ温度范围内，通过精密测量获得的２１组ＨＦＣ－１２５表面张力实验数据。实验所用的样品纯度为９９．９８％。这些数据是利用毛细管表面张力实验装置，分别按两种方法─—绝对法和相对法测量计算得到的。不同方法的结果吻合得很好，相对偏差在０．２％以内，绝对偏差小于０．０１ｍＮ／ｍ，所测得的数据具有很高的可信性。最后还通过对实验数据拟合，提出了该温度范围内ＨＦＣ－１２５表面张力与温度间的关联式。
In order to meet the urgent international call for banning CFCs and HCFCs in the Montreal Protocol, the search for their alternatives has become a top priority. HFC-125 is by now an essential component of all mixed refrigerants used to replace HCFC-22, and its physical properties are still lacking. In particular, its surface tension study is especially rare. Therefore, the experimental data of 21 groups of HFC-125 surface tension obtained by the precision measurement in the temperature range 233.15 ~ 333.15K are presented in this paper. The purity of the sample used in the experiment was 99.98%. These data were calculated using capillary surface tension test apparatus, measured by two methods - absolute and relative measurements, respectively. The results of different methods agree well with the relative deviation of 0.2% or less, the absolute deviation of less than 0.01mN / m, the measured data with high credibility. Finally, by fitting the experimental data, the correlation between the surface tension of HFC-125 and temperature in this temperature range is proposed.