Closed‐loop recycling of postused PP‐filled garden chairs using the restabilization technique. III. Influence of artificial weathering

Artificial weathering was performed for 4000 h to evaluate the light stability of postused, CaCO 3 ‐filled polypropylene material recycled from garden chairs. The old chair material was recycled by applying the remelting–restabilization technique while using different stabilization systems in selected concentrations. To study the role of restabilization in the material performance, the tensile impact strength was monitored during the artificial weathering exposure. The data were compared to microphotographs of the specimens' surfaces. The effect of light on the material was further studied through yellowness index (Y.I.) determinations. The results revealed that the appropriate restabilization of the postconsumer chair material is mandatory for improving its light stability, ensuring its reuse in the original application.