Premium
Effects of decoppering pretreatment on accelerated weathering behaviors of waste printed circuit boards powders reinforced polypropylene composites
Author(s) -
Tian Shenghui,
Luo Yuanfang,
Ma Yuanbin,
He Hui,
Jia Demin,
Zhang Ling,
Chen Yong
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48224
Subject(s) - nitric acid , polypropylene , ultimate tensile strength , materials science , composite number , composite material , fourier transform infrared spectroscopy , scanning electron microscope , printed circuit board , nuclear chemistry , chemical engineering , chemistry , metallurgy , computer science , operating system , engineering
Waste printed circuit boards powders (WPCBP), the critical by‐products in the dispose process of waste electrical and electronic equipment, were selected as reinforcing fillers in polypropylene (PP) composites, which brought forward a new way to reuse WPCBP for a sustainable world. However, the multivalent metals in WPCBP could accelerate the degradation of PP molecule chains. In this study, nitric acid was selected as copper removal to pretreat WPCBP, and most of the metals were removed after decoppering pretreatment, which was evidenced by X‐ray fluorescence (XRF). The ensuing compound was characterized by oxidation induction time, scanning electron microscopy, Fourier transform infrared spectroscopy, and mechanical analysis. As expected, the accelerate weathering behaviors of PP composite with nitric acid treated WPCBP were substantially improved, for instance, the notched impact strength and tensile strength of untreated PP/WPCBP composite after 21 days thermal aging were just 0.85KJ/m 2 and 9.3 MPa, while the PP composite with 6 wt % nitric acid‐treated WPCBP was 3.47KJ/m 2 and 32.1 MPa. We envisage this facile strategy, that is, using proper concentration of nitric acid to pretreat WPCBP could improve the accelerate weathering properties of PP/WPCBP composites, which would broaden the potential applications of WPCBP in polymer compounds. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48224.