Exterior Polymer Surface Degradation via Accelerated Weathering

The purpose of this study was to analyze and quantify the effects of accelerated weathering on the surface of various “weatherable” polymers currently utilized for molded-in-color exterior automotive applications. Evaluations consisted of gloss/color retention and surface changes after accelerated weathering exposure, with and without intermittent washing, to simulate product life cycle. Results were found to be affected by both polymer type and interim surface treatments. Data are presented as a means to define specific performance and aesthetic capabilities of these various polymers in a mold-in-color environment to optimize material selection for related component applications.