Abstract
Adhesion is a key parameter in studying films and coatings. There are several techniques used to evaluate a film or coating, but the main procedures are indicated by ASTM D4541-17/D7234-12, ISO 4624:2016/16276–1:2007, and ASTM D3359-17 norms. These norms are semi-quantitative and in this study, image analysis with digital optical microscopy shows a quantitative evaluation for each of them. Also, due to the low surface energy and limited adhesion properties of polymeric materials, this study was carried out on the modification of the surface of a polymeric substrate (polycarbonate) by using the treatment of flame and atmospheric pressure plasma to improve the interfacial adhesion between substrate and coating. Various characterization techniques such as XPS, contact angle, Pull-off, Scotch tape, and digital microscopy have been used to determine the adhesion and surface characteristics. The applied treatments are used to chemically modify the surface, thus, obtaining surfaces with hydrophilic properties in line with the results obtained using contact angle, when compared to non-treated surfaces, so that an improvement in adhesion was obtained, being less than the area of detachment of the coatings.
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