Physico-chimie des surfaces de polyoléfines traitées par décharges luminescentes à barrière diélectrique à la pression atmosphérique

The purpose of this study is to investigate the treatment of polyolefins by atmospheric pressure glow discharges in nitrogen gas (N₂ APGD).

The two polymers studied here are well-characterized biaxialy-oriented polypropylene (BOPP) and low-density polyethylene (LDPE) films. For both cases, the effects of N₂ APGD treatments are compared with those obtained with DBD treatments in air. The surface energy of the modified polymers is evaluated by contact angle measurements using several probe liquids (method of Owens, Wendt and Kaelble). Also, the surface chemistry of the treated films is investigated by X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (ATR-FTIR), and secondary ion mass spectrometry (ToF-SIMS). Finally, the impact of the treatments on the surface morphology of the polymers is evaluated by atomic force microscopy (AFM). Ageing behavior, often called “hydrophobic recovery”, is also compared for both films and both treatment types. (Abstract shortened by UMI.)