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New method of analysis of the surface free energy of polymeric materials calculated with Owens-Wendt and Neumann methods

机译:用Owens-Wendt和Neumann方法计算聚合材料表面自由能的新方法

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摘要

A new method of analysis of differences in the surface free energy (SFE) values of a solid,calculated using the methods of Owens-Wendt (OW) and Neumann and two measuring liquids,water and diiodomethane,is presented.The concept of the analysis bases on the differences in SFE,which occur objectively and regardless of both the precision and the performing conditions of the contact angle (CA) measurements.These differences result from utilizing of different mathematical relations between CA and SFE in each of the methods.The results obtained with these two methods are compared with one another over the SFE range common for polymeric materials (20-50 mJ/m~2).It is calculated that the relative difference in SFE between the results from the OW and Neumann methods can reach 19.9 % over this range.
机译:提出了一种新的分析固体表面自由能(SFE)值差异的方法,该方法使用Owens-Wendt(OW)和Neumann方法以及两种测量液体(水和二碘甲烷)计算得出。基于SFE的差异,这些差异是客观发生的,而与接触角(CA)测量的精度和执行条件无关,这些差异是由于CA和SFE在每种方法中利用不同的数学关系导致的。将这两种方法获得的结果在聚合物材料常见的SFE范围内(20-50 mJ / m〜2)进行比较,据计算,OW和Neumann方法的结果之间SFE的相对差异可以达到19.9。在此范围内的百分比。

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