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Mechanical recycling of multiphase contaminated plastic waste via physical compatibilization: a study on rheological, morphological and mechanical properties
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This study examines mechanical recycling strategies for plastic waste streams that contain multiple polymer types and contaminants, which are notoriously difficult to process. Researchers assessed how contamination and material complexity affect the quality and usability of the recycled output. The work addresses a key bottleneck in scaling up real-world plastic recycling infrastructure.
During the recycling of polyethylene (PE)-based agricultural film waste, the presence of small amounts of polypropylene (PP)-containing films can significantly deteriorate the mechanical properties of the recycled material.
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Polypropylene Contamination in Post-Consumer Polyolefin Waste: Characterisation, Consequences and Compatibilisation
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Researchers characterized polypropylene contamination in post-consumer polyolefin plastic waste, finding that heterogeneous contaminants significantly compromise recycled material properties and examined compatibilisation strategies to improve recycling outcomes.
Morpho-structural and thermo-mechanical characterization of recycled polypropylene and polystyrene from mixed post-consumer plastic waste
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Researchers characterized recycled polypropylene and polystyrene recovered from mixed post-consumer plastic waste, assessing their morphological, structural, and thermo-mechanical properties to evaluate suitability for reuse in manufacturing.
Evaluation of Thermoplastic Starch Contamination in the Mechanical Recycling of High-Density Polyethylene
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This study examined how contamination of high-density polyethylene recycling streams with thermoplastic starch (TPS) affects the quality of recycled material, finding that PE-TPS blends lack miscibility and exhibit deteriorated mechanical properties, thermal stability, and color. The findings highlight the importance of preventing bioplastic cross-contamination in conventional plastic recycling streams.
Assessment of the Impact of Superficial Contamination and Thermo-Oxidative Degradation on the Properties of Post-Consumer Recycled Polypropylene
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This study investigated how surface contamination and thermo-oxidative degradation during repeated use affect the mechanical and chemical properties of post-consumer recycled polypropylene, finding that these degradation processes significantly reduce material quality and pose challenges for achieving high-quality recycled plastic products.
Investigation of Thermo-mechanical Degradation of Polypropylene-Low Density Polyethylene Blends Exposed to Simulated Recycling
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Researchers simulated repeated mechanical recycling of polypropylene blended with low-density polyethylene through up to five extrusion cycles, finding that while chain scission increased melt flow rate and reduced crystallinity, the blended material retained mostly acceptable mechanical and thermal properties, supporting PP/LDPE recycling as a viable waste-reduction strategy.
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