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Ultralong Lifetime of Active Surface of Oxygenated PET Films by Plasma-irradiation and Bonding Elements

Published online by Cambridge University Press:  12 June 2012

Miyoshi Yokura
Affiliation:
Mie University, 1577 Kurima, Tsu, Mie 514-8507, Japan. Adwel R&D Co. Ltd., Ritto, Shiga, Japan.
Kenichi Uehara
Affiliation:
Mie University, 1577 Kurima, Tsu, Mie 514-8507, Japan.
Guo Xiang
Affiliation:
Mie University, 1577 Kurima, Tsu, Mie 514-8507, Japan.
Kazuya Hanada
Affiliation:
Mie University, 1577 Kurima, Tsu, Mie 514-8507, Japan.
Yoshinobu Nakamura
Affiliation:
The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
Lakshmi Sanapa Reddy
Affiliation:
Department of Physics, S.V.D. College, Kadapa, India.
Kazuhiro Endo
Affiliation:
Kanazawa Institute of Technology, Nonoichi, Ishikawa, Japan.
Tamio Endo
Affiliation:
Mie University, 1577 Kurima, Tsu, Mie 514-8507, Japan.
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Abstract

Biaxially oriented polyethylene terephthalate (PET) films can be bonded directly by oxygen plasma irradiation and low temperature heat press around 100°C. The irradiated films were kept in the atmosphere for six years, yet they can be bonded tightly as well. Dry- and wet-peel tests indicate that two bonding elements can be suggested, hydrogen bonding and chemical bonding. The films are bonded by these two elements at lower temperatures, but by the pure chemical bonding at higher temperatures. FTIR results on the non-irradiated, irradiated and bonded samples indicate that OH and COOH groups are created at the surface, they are responsible for the hydrogen and chemical bondings. Dehydrated condensation reaction is proposed for the chemical bonding. It is briefly mentioned on two origins for the long lifetime of irradiated active surface.

Type
Articles
Copyright
Copyright © Materials Research Society 2012

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