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Recycling polymeric waste from electronic and automotive sectors into value added products

Frontiers of Environmental Science & Engineering 2017年第5期11卷 55-64页

作者： Abhishek Kumar Veena Choudhary Rita Khanna romina cayumil Muhammad Ikram-ul-Haq Veena Sahajwalla Shiva Kumar I. Angadi Ganapathy E. Paruthy Partha S. Mukherjee Miles Park Centre for Polymer Science and Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India Centre for Sustainable Materials Research and Technology (SMART) School of Materials Science and Engineering The University of New South Wales Sydney NSW 2052 Australia CSIR- Institute of Minerals and Materials Technology Advanced Materials Technology Department Bhubaneshwar Orissa 751013 India Industrial Design Australian School of Architecture and Design The University of New South Wales Sydney NSW 2052 Australia

The environmentally sustainable disposal and recycling of ever increasing volumes of electronic waste has become a global waste management issue. The addition of up to 25% polymeric waste PCBs （printed circuit boards） as fillers in polypropylene （PP） composites was partially successful： while the tensile modulus, flexural strength and tlexural modulus of composites were enhanced, the tenstle and impact strengths were found to decrease. As a lowering of impact strength can significantly limit the application of PP based composites, it is necessary to incorporate impact modifying polymers such as rubbery particles in the mix. We report on a novel investigation on the simultaneous utilization of electronic and automotive rubber waste as fillers in PP composites. These composites were prepared by using 25 wt.% polymeric PCB powder, up to 9% of ethylene propylene rubber （EPR）, and PP： balance. The influence of EPR on the structural, thermal, mechanical and rheological properties of PP/PCB/ EPR composites was investigated. While the addition of EPR caused the nucleation of the I~ crystalline phase of PP, the onset temperature for thermal degradation was found to decrease by 8%. The tensile modulus and strength decreased by 1 b% and 19%, respectively; and the elongataon at break increased by -71%. The impact strength showed a maximum increase of-18% at 7 wt.%-9 wt.% EPR content. Various rheological properties were found to be well within the range of processing limits. This novel eco-friendly approach could help utilize significant amounts of polymeric electronic and automotive waste for fabricating valuable polymer composites.

关键词： E-waste Polymer composites Recycling RubberWaste PCBs Filler

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