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Surface modification of polyethylene terephthalate film by CO2 laser-induced graft copolymerization of acrylamide

✍ Scribed by M. Dadsetan; H. Mirzadeh; N. Sharifi-Sanjani

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
214 KB
Volume
76
Category
Article
ISSN
0021-8995

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✦ Synopsis

Graft copolymerization of acrylamide onto polyethylene terephthalate (PET) using a CO 2 pulsed laser was performed to improve water wettability. After laser irradiation in air, the films were placed in the aqueous solution of monomer and then heated to decompose peroxides formed onto the irradiated PET film. Peroxide density was determined spectrophotometrically by means of the iodide method. The grafted PET surfaces were characterized by attenuated total reflectance infrared spectroscopy, scanning electron microscopy, and contact angle measurements. The electron micrographs showed that the grafting changed the surface morphology of the PET film, which is consistent with the infrared spectra of the grafted films. To evaluate the surface hydrophilicity, water drop contact angle was determined. The contact angle decreased as a result of graft polymerization. It was also found that the hydrophilicity is related to the surface morphology and grafting level.

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