Reactive processing of recycled polycarbonate/acrylonitrile butadiene styrene.
Cellular phone housings were ground to make original particulates using a knife mill. Foams and adhesives with a lighter density than water were removed from ground mixtures using a sink-float process in water; ground metals, button rubbers, and wires were separated from desired materials by using a sink float process in salt All housing materials, consisting of seven thermoplastics included in cellular phone housings, showed better tensile properties than pure housing materials made of polycarbonate/acrylonitrile butadiene styrene, but they only had about half of the impact strength. In contrast, the low impact strength for all housing materials was improved by adding 25 wt % polyethylene elastomer and/or 2.4 wt % ground epoxy circuit boards for batch mixing. Impact strengths, tensile strengths, and the energy absorption ability of all housing materials were improved by adding 5.4wt% glycidyl methacrylate for twin screw extrusion.
Jung
Woo-Hyuk
WH
Nano Materials R&D, Thermolon Korea, Ltd., 16th Floor, Cangen Tower, 6-ga 12, Jungang-dong, Jung-gu, Busan 614-714, Korea.
Choi
Yeon-Sil
YS
Moon
Jung-Min
JM
Tortorrela
Nathan
N
Beatty
Charles L
CL
Lee
Jang-Oo
JO
D000180:Acrylic Resins / Q000737:chemistry*; D002070:Butadienes / Q000737:chemistry*; D003247:Conservation of Natural Resources; D008855:Microscopy, Electron, Scanning; D011076:Polycarboxylate Cement / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013718:Tensile Strength
D000180:Acrylic Resins; D002070:Butadienes; D011076:Polycarboxylate Cement; D011137:Polystyrenes; C005506:polycarbonate; C024636:ABS resin