Abstract
The use of polymer matrix composites in civil engineering and construction (including offshore) is becoming increasingly attractive. Therefore, the mechanical performance as a function of outdoor environment, particulary after high intensity UV- exposures, is becoming a real issue. In this work, samples made out of monolithic vinylester as well as vinylester/glass-fiber composite we re exposed to UV-radiation. The mechanical behaviour of these samples was characterized mainly using nanoindentation. Laser Scanning Confocal Microscopy (LSCM) was used to quantify the topography of the samples that were roughened following UV-exposure. A method is he rein developed and is based on a cross-cut of samples and a polish of the transverse face providing a mirror finish needed for nanoindentation while avoiding the elimination of the exposed surface. This method is enabling the estimate of the local Young?s modulus and hardness as a function of exposure time, while specifying the thickness of the material affected by UV.
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