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Recycling 2016, 1(1), 101-110; doi:10.3390/recycling1010101

The Influence of Compatibilizer Addition and Gamma Irradiation on Mechanical and Rheological Properties of a Recycled WEEE Plastics Blend

1
Chemistry and Chemical Technology, Chalmers University of Technology, Gothenburg SE-412 96, Sweden
2
Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg SE-412 96, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: William Bullock
Received: 18 November 2015 / Revised: 18 January 2016 / Accepted: 19 January 2016 / Published: 25 January 2016
(This article belongs to the Special Issue Waste to Resources: Legacy Value from E-Waste)
View Full-Text   |   Download PDF [1704 KB, uploaded 25 January 2016]   |  

Abstract

Waste electrical and electronic equipment (WEEE) is growing rapidly, and the plastics within WEEE have an important role in fulfilling the recovery and recycling targets defined in the European WEEE Directive. This study considers recycling of WEEE plastics by making a blend of the different plastics instead of separating them. The mechanical and thermal properties can be enhanced by adding a compatibilizer. It was found that one compatibilizer, a styrene-b(ethylene-co-butylene)-b-styrene (SEBS) copolymer named Kraton® G1652 E, had a large impact on the ductility of the recycled WEEE plastics blend. By adding 2.5 weight % (wt%) of this copolymer, the elongation at break increased by more than five times compared with the non-compatibilized samples, with only a small decrease in stiffness and strength. The storage modulus (G’) decreased slightly with increasing compatibilizer amounts while the impact strength increased with increasing amounts of compatibilizer, from 2.1 kJ/m2 (reference material) to 3.6 kJ/m2 (5 weight % (wt%) compatibilizer). It was found that Kraton® FG1901 E (styrene-b(ethylene-co-butylene)-b-styrene (SEBS) grafted with maleic anhydride (MAH)), Royaltuf® 372P20 (styrene acrylonitrile (SAN) modified with ethylene-propylene-diene elastomers (EPDM)) and Fusabond® P353 (polypropylene (PP) with a high degree of grafted MAH) were ineffective as compatibilizers to the blend. Gamma irradiation (50 kGy) did not improve the mechanical properties however: the impact strength of the gamma-irradiated samples was lower than that of the non-irradiated samples. View Full-Text
Keywords: WEEE; recycling; compatibilizer; SEBS; plastics blend WEEE; recycling; compatibilizer; SEBS; plastics blend
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tostar, S.; Stenvall, E.; Foreman, M.R.S.J.; Boldizar, A. The Influence of Compatibilizer Addition and Gamma Irradiation on Mechanical and Rheological Properties of a Recycled WEEE Plastics Blend. Recycling 2016, 1, 101-110.

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