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Effect of the corona treatment and of the 1,4‐cyclohexanedimethanol on the surface characteristics of the poly(ethylene terephthalate) film
Author(s) -
Pinto Georgia Vieira De Vasconcelos Vilaça,
De Abreu César Augusto Moraes,
Knoechelmann Augusto,
De Almeida Yêda Medeiros Bastos
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991480125
Subject(s) - materials science , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , attenuated total reflection , surface roughness , amorphous solid , surface tension , surface modification , chemical engineering , composite material , thin film , polymer chemistry , nanotechnology , organic chemistry , chemistry , physics , quantum mechanics , engineering
Several techniques have been applied for the characterization of three PET films surfaces: homopolymer PET film, corona treated PET film and a poly(ethylene terephthalate‐co‐1,4‐cyclohexanedimethanol) film. The objective of this work is to investigate and to apply precise and mutually complementary techniques which give detailled information about theses surfaces, as there are few papers with global and conclusive results. The film surfaces were investigated to support the development of new products and envisage new apllications to the existent films. Scanning electron micrographs, attenuated total reflection Fourier transform infrared spectroscopy (FTIR‐ATR) and multiple internal reflection Fourier transform infrared spectroscopy (FTIR‐MIR) spectra show that the chemical composition, topography and surface roughness of the films are different. The corona‐treated PET film shows high surface tension value due to the major contribution on the polar groups and oxidation level acquired. The copolyester film is much less crystalline than the other films analyzed, as demonstrated by refractive index measurements and X‐ray photoelectron spectroscopy (XPS). The amorphous structures obtained and the high tension level of the corona‐treated films provide a better understanding of the adhesion phenomena. In view of results obtained, one can assume that corona treated films owing to its higher surface tension and films with CHDM owing to its surface amorphization should provide manufacturing industries better processing conditions than films without surface treatment and also higher levels of adhesion to paints and coatings.