Enhancement of adhesion on polyether etherketone (PEEK) by excimer laser treatments

Benedicte Sadras; Patricia Laurens; F. Decobert; F. Arefi; Jacques Amouroux

doi:10.1117/12.251191

23 September 1996 Enhancement of adhesion on polyether etherketone (PEEK) by excimer laser treatments

Benedicte Sadras, Patricia Laurens, F. Decobert, F. Arefi, Jacques Amouroux

Proceedings Volume 2789, High-Power Lasers: Applications and Emerging Applications; (1996) https://doi.org/10.1117/12.251191
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

Abstract

Due to its important chemical stability, polyether- etherketone (PEEK) thermoplastic presents poor adhesive bonding properties. The possibilities of enhancing the PEEK adhesive properties by excimer laser pretreatments are investigated. Surface modifications are characterized, depending on the experimental working conditions, using SEM, profilometry, XPS, wettability and mechanical tests. In the case of an excimer laser pretreatment, the induced surface modifications are dependent on the energetic density of the incoming laser beam: (1) for E > E ablation threshold, surface ablation occurs. The treated surface is characterized by an considerable roughness increase, a carbon content enrichment and a decrease of wettability. The adhesive bounding properties are very significantly increased. (2) For e < E ablation threshold, the treatment induces superficial thermal and chemical modifications. Surface amorphization, formation of new 0-C equals O bonding, decrease of the C-O and C equals O bonding and a decrease of the shake up signal. The increase of the water wettability is more pronounced when the treatment gas contains oxygen. A cohesive failure in the adhesive was obtained when treatment is achieved using argon gas whereas an adhesive failure at the interface may be evidenced when air is used. Lap shear strength values show that excimer laser irradiation improve PEEK adhesion bonding properties for all treatment conditions.

Citation Download Citation

Benedicte Sadras, Patricia Laurens, F. Decobert, F. Arefi, and Jacques Amouroux "Enhancement of adhesion on polyether etherketone (PEEK) by excimer laser treatments", Proc. SPIE 2789, High-Power Lasers: Applications and Emerging Applications, (23 September 1996); https://doi.org/10.1117/12.251191

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KEYWORDS

Adhesives

Polymers

Oxygen

Argon

Laser ablation

Excimer lasers

Chemical analysis

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