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. 2019 Sep 12;11(9):1490. doi: 10.3390/polym11091490

Figure 3.

Figure 3

Surface energy of materials. (Left), contact angle measurements of water (WA) and methylene iodide (MI); (Right), surface energy components of materials. γ, total surface energy; γd and γp, dispersive and polar components of surface energy, respectively. For WA, the dispersive and polar components of 21.8 and 51.0 mN/m, respectively, were used [50]. For MI, the dispersive and polar components of 50.4 and 0.4 mN/m, respectively, were used [50].