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Surface treatment of an epoxy resin by CO2 laser irradiation

Oberflächenbehandlung eines Epoxidharzes durch CO2-Laserstrahlung
: Hartwig, A.; Vitr, G.; Dieckhoff, S.; Hennemann, O.-D.


Die Angewandte Makromolekulare Chemie 238 (1996), Nr.4187, S.177-189
ISSN: 0003-3146
Fraunhofer IFAM ()
adhesive bonding; CO2-Laser; Epoxidharz; epoxy resin; IR; Kleben; Oberflächenmodifikation; surface modification; XPS

The influence of CO2 laser radiation on the surface properties of a lamination resin (temperature resistant up to 120 deg C) which is used for carbon fibre-reinforced plastics (CFRP) is examined. It is shown by XPS and infrared spectroscopy that the hydroxy groups of the resin are eliminated by the laser radiation. Using a carbon dioxide atmosphere, also deeper parts of the resin are influenced compared to the treatment in air. The reproducibility of the bond strength is higher for the laser-treated samples than for untreated samples if a room temperature-curing adhesive is used, but the bond strength itself is lower. Laser treatment shows no influence at all if a hot-curing adhesive is used.