Publication: Surface modification of biaxially oriented polypropylene (BOPP) film using acrylic acid-corona treatment: Part I. Properties and characterization of treated films
Issued Date
2012-08-25
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ISSN
02578972
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2-s2.0-84865773187
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Mahidol University
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SCOPUS
Bibliographic Citation
Surface and Coatings Technology. Vol.207, (2012), 594-601
Suggested Citation
Nanticha Kalapat, Taweechai Amornsakchai Surface modification of biaxially oriented polypropylene (BOPP) film using acrylic acid-corona treatment: Part I. Properties and characterization of treated films. Surface and Coatings Technology. Vol.207, (2012), 594-601. doi:10.1016/j.surfcoat.2012.07.081 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/13950
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Title
Surface modification of biaxially oriented polypropylene (BOPP) film using acrylic acid-corona treatment: Part I. Properties and characterization of treated films
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Abstract
In this work, the acrylic acid (AAc)-corona discharge was carried out on biaxially oriented polypropylene (BOPP) films by introducing AAc vapor into the corona region of a normal corona treater. Three different corona energies of 15.3, 38.2 and 76.4kJ/m 2 were studied. Surface properties of treated films were compared with those of air-corona treated films prepared with the same corona energies. The change in chemical composition on the film surface was characterized by curve-fitting of the ATR-FTIR spectra. The wettability of treated films, before and after aging in different environments, was observed by water contact angle and surface free energy. The surface morphology of air- and AAc-corona treated films was investigated using SEM and AFM techniques. Adhesion of the treated films to some other substrate was determined with the T-peeling test. It was found that the hydrophilicity of all treated films increased with increasing corona energy. AAc-corona treated films showed greater wettability than did the air-corona treated films and could retain the surface hydrophilicity for more than 90days of aging under ambient conditions. The surface morphology of BOPP films changed after corona treatment into a globular structure. The AAc-corona treated films showed rougher surfaces due to surface oxidation and polymer formation, whereas, air-corona treated films displayed a similar structure but of smaller size due to the formation of low molecular weight oxidized materials (LMWOM) arising from the degradation of BOPP films. AAc-corona treated films showed greater peel strength than did the air-corona treated films. © 2012 Elsevier B.V.