ISO 19403-5:2017
Paints and varnishes — Wettability — Part 5: Determination of the polar and dispersive fractions of the surface tension of liquids from contact angles measurements on a solid with only a disperse contribution to its surface energy
ISO 19403-5:2017 specifies a test method to determine the polar and dispersive fractions of the surface tension of liquids by optical methods. The method can be applied for the characterization of liquid coating materials.
The applicability can be restricted for liquids with non-Newtonian rheology[1].
ISO 19403-5:2017 assumes that the information of surface tension of the liquid to be tested and the surface free energy of the dispersive reference solids is known.
[1] This term is defined in DIN 1342-1.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reference solid
6 Sampling
7 Procedure
7.1 Test conditions
7.2 Determination of the surface tension of the liquid to be tested
7.3 Determination of the surface free energy of the reference solid
7.4 Determination of the contact angle of the liquid to be tested on the reference solid
8 Evaluation
8.1 General
8.2 Owens-Wendt-Rabel-Kaelble method (OWRK method)
8.3 Wu method
8.4 Calculation of the polar fraction of the surface tension of the liquid
9 Precision
10 Test report
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reference solid
6 Sampling
7 Procedure
7.1 Test conditions
7.2 Determination of the surface tension of the liquid to be tested
7.3 Determination of the surface free energy of the reference solid
7.4 Determination of the contact angle of the liquid to be tested on the reference solid
8 Evaluation
8.1 General
8.2 Owens-Wendt-Rabel-Kaelble method (OWRK method)
8.3 Wu method
8.4 Calculation of the polar fraction of the surface tension of the liquid
9 Precision
10 Test report
Bibliography