Recycling of automotive shredder residue by solid state shear milling technology

摘要

The main compositions in automotive shredder residue (ASR) were polymers, up to about 70 wt%, which is difficult to be separated and classified. In this work, ultrafine ASR powders was prepared through a mechanochemical technology called solid state shear milling (S M-3) and the melt blending process was further applied to produce value-added polypropylene (PP) composites. Both optical and electron microscopy revealed the excellent dispersion and in-situ compatibilization of ASR were achieved in the PP/ASR composites. After (SM)-M-3 treatment the tensile strength, elongation at break and charpy notched impact strength of PP/ASR composites were increased by 39%, 285% and 50%, respectively. Moreover, the mechanical properties of the composites were even superior to those with addition of PP-g-MAH (a commercial compatibilizer). The ASR recycling strategy proposed here is simple, low cost, efficient and green, exhibiting great potential for fabricating non-structural products used in the realms of container for waste, plastic garbage bags and the road stone. (c) 2017 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry.