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Recycling 2016, 1(1), 89-100;

Mechanical and Thermal Characterization of Melt-Filtered, Blended and Reprocessed Post-Consumer WEEE Thermoplastics

Materials and Manufacturing Technology, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
Author to whom correspondence should be addressed.
Academic Editor: William Bullock
Received: 26 November 2015 / Revised: 9 December 2015 / Accepted: 17 December 2015 / Published: 5 January 2016
(This article belongs to the Special Issue Waste to Resources: Legacy Value from E-Waste)
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A melt-blended and melt-filtered real post-consumer and recyclable waste electrical and electronic equipment plastics blend (WEEEBR) was studied, where the WEEEBR contained mainly acrylonitrile-butadiene-styrene copolymer (~40 wt %), high impact polystyrene (~40 wt %) and polypropylene (~10 wt %). The main aim was to better understand the influence of different reprocessing conditions on the mechanical and thermal properties of WEEEBR and to compare these properties with the corresponding properties of model material blends of samples from single screw extrusion, twin screw extrusion and injection molding. For all the reprocessing alternatives studied, WEEEBR was found to be processable and an acceptable surface character could be obtained within narrow processing condition windows. It was found in particular that the reprocessing conditions influenced the elongation at break of WEEEBR, and to a lesser extent also the width of the polypropylene melting temperature region. The highest yield stress and elongation at break of WEEEBR was obtained after twin-screw extrusion at low barrel temperatures (180–200 °C) and a low screw rotation rate (60 rpm). Injection molding produced brittle materials with low impact strength, possibly due to molecular orientation effects. View Full-Text
Keywords: WEEE; blend; extrusion; reprocessing WEEE; blend; extrusion; reprocessing

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Stenvall, E.; Boldizar, A. Mechanical and Thermal Characterization of Melt-Filtered, Blended and Reprocessed Post-Consumer WEEE Thermoplastics. Recycling 2016, 1, 89-100.

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