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Polyolefins and Polyethylene Terephthalate Package Wastes: Recycling and Use in Composites
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This review examines recycling strategies for polyolefins and polyethylene terephthalate — two of the most prevalent plastic packaging materials — covering mechanical and chemical recycling methods, how recycling affects material properties, and opportunities to improve recycled material performance for use in composites and other applications.
Plastics are versatile materials used in a variety of sectors that have seen a rapid increase in their global production. Millions of tonnes of plastic wastes are generated each year, which puts pressure on plastic waste management methods to prevent their accumulation within the environment. Recycling is an attractive disposal method and aids the initiative of a circular plastic economy, but recycling still has challenges to overcome. This review starts with an overview of the current European recycling strategies for solid plastic waste and the challenges faced. Emphasis lies on the recycling of polyolefins (POs) and polyethylene terephthalate (PET) which are found in plastic packaging, as packaging contributes a signification proportion to solid plastic wastes. Both sections, the recycling of POs and PET, discuss the sources of wastes, chemical and mechanical recycling, effects of recycling on the material properties, strategies to improve the performance of recycled POs and PET, and finally the applications of recycled POs and PET. The review concludes with a discussion of the future potential and opportunities of recycled POs and PET.
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The mechanical properties of PET plastic material recovered from post-consumer packaging waste were assessed to evaluate its suitability for reuse in new applications. The study examines whether recovered PET retains sufficient strength and quality for circular economy applications, addressing the challenge of single-use plastic waste.
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This review examines polyethylene terephthalate's structural and mechanical properties before and after mechanical recycling, detailing how degradation mechanisms during reprocessing affect the quality of the final product. The authors identify key knowledge gaps around structural modifications caused by processing and highlight widely used reinforcement techniques along with their limitations for industrial PET recycling.
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This study examines how recycled PET and polyolefin plastics reinforced with aluminum and iron nanopowders behave structurally, using microscopy and thermal analysis to characterize the composites. It is marginally relevant to microplastics in that it explores recycling pathways for packaging plastics that would otherwise degrade into environmental microplastic pollution.
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This review paper rounds up scientific progress on turning plastic waste into new chemicals and materials—instead of just melting it down into lower-quality plastic (what most "recycling" does today, and only for 9% of waste). Better recycling methods matter for your health because plastic that isn't properly processed often ends up in landfills, oceans, or breaking down into microplastics that contaminate our food, water, and even our bodies. These emerging chemical methods could help close the loop on plastic waste, though the researchers note real challenges remain before this happens at scale, including cost and technical hurdles.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.