Free surface energy of some polymers
The wetting contact angle in the systems polymer—water drop—air and polymer—methylene iodide drop—air has been measured for PTFE, PE, PET, PMMA, PVC, PA, PP and PA 6. Using the wetting angle values obtained, literature data of the components of the surface tension of water and measured by Authors values of components of surface tension of methylene iodide, the dispersion and no-dispersion components of the surface free energy have been calculated for the above mentioned polymers on the basis of own-modified Girifalco-Good-Fowkes-Young equation. It has been found that the free surface energy of the Polish-made polymers is practically similar to that of the corresponding foreign-made polymers.
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