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. 2021 Mar 15;13(6):901. doi: 10.3390/polym13060901

Figure 4.

Figure 4

Evolution and tendency of the wetting contact angle of distilled water on High Impact PolyStyrene (HIPS) specimen depending on the distance of the plasma surface treatment head, using different plasma head scanning speeds. The untreated sample’s contact angle using distilled water is shown.