Tags: Chemistry  Institute  Polymer  Processing  Stevens  
Channel: Education
Uploaded: December 31, 1969 at 6:59 pm
Author: h4ck3rm1k3
Length: 01:19
Rating: N/A
Views: 6
The achievements of Dr. Luigi Zummo Pollara - Water with specially prepared Teflon approaches this. ref name="cwp"/ Contact angle of 180° occurs when the liquid-solid surface tension is exactly equal to the liquid-air surface tension. : math \gamma_ \mathrm la \ =\ \gamma_ \mathrm ls - \gamma_\mathrm sa \ \ 0\qquad \theta\ =\ 180\circ /math br clear="right" ==Methods of measurement== Because surface tension manifests itself in various effects, it offers a number of paths to its measurement. Which method is optimum depends upon the nature of the liquid being measured, the conditions under which its tension is to be measured, and the stability of its surface when it is deformed. * Du Noüy Ring method: The traditional method used to measure surface or interfacial tension. Wetting properties of the surface or interface

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