Long Lifetime of Plasma Effect on Bonding of Poly(ethylene terephthalate) Films and Surface Analyses

Yokura, Miyoshi; Hanada, Kazuya; Uehara, Kenichi; Nakamura, Yūichi; Reddy, L. Srinivasula; Nishikawa, Hiroaki; Nagashima, Masatsugu; Endo, Tamio

doi:10.7567/jjap.51.11pg14

Cited by 2 publications

(2 citation statements)

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“…Then, it is clarified that the plasma bonding effect is not suppressed by the solutions of the pure water, acid, alkali, and organic solvent. Then, the functional groups of OH and COOH created on the irradiated surface (speculated in our previous works [23][24][25][26][27] ) do not lose their activity by these solutions, or do not react with these solutions. This is very important in terms of practical applications because we do not need to protect the irradiated films from these solutions before the heat-pressing.…”

Section: Contact Angle and Bonding Strength After Soaking In Liquid R...mentioning

confidence: 99%

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Bonding effect of plasma-irradiated PET films can be preserved after soaking in various liquid reagents

Yokura

Uehara²,

Hanada

et al. 2014

Jpn. J. Appl. Phys.

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To clarify the bonding mechanism for the plasma-irradiated PET films and the origin of the long lifetime of the bonding ability, we soaked the irradiated films in various types of liquid reagent, then tried to bond them by heat-pressing. The irradiated films do not lose the bonding ability after soaking in water, acid, alkali, and organic solvents, whereas they lose it after soaking in ionic solutions of AlCl 3 and FeCl 3 . The COOH is created on the surface by the irradiation, but it is consumed by the chemical reaction with Al and Fe ions. This is the origin of the inactivation of the irradiated surface and the disappearance of the bonding ability after the soaking. The result supports our proposal of "dehydrated condensation reaction" concerning COOH as the bonding mechanism. The irradiated films should be stable in a normal atmosphere for a long time because they are not subjected to water, acid, alkali, and organic solvents.

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Section: Contact Angle and Bonding Strength After Soaking In Liquid R...mentioning

confidence: 99%

“…We have clarified them but not yet fully. [23][24][25][26][27] For further clarification, we investigated the effects of soaking of the irradiated PET films some liquid reagents before the heat-pressing on the bonding nature.…”

Section: Introductionmentioning

confidence: 99%