화학공학소재연구정보센터
Journal of Adhesion Science and Technology, Vol.30, No.15, 1597-1601, 2016
Uncertainty in contact angle measurements from the tangent method
The uncertainty in contact angles from sessile drops measured by the tangent method was estimated using a standard error propagation technique involving partial derivatives. If contact angles are<60 degrees, then uncertainty of the tangent method appears to be quite small,<= +/- 2 degrees. However, as theta values approach 90 degrees, uncertainty increases asymptotically and can exceed +/- 5 degrees.