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  2. Plastic recycling - Wikipedia

    en.wikipedia.org/wiki/Plastic_recycling

    In feedstock recycling, also called chemical recycling or tertiary recycling, polymers are reduced to their chemical building-blocks , which can then be polymerised back into fresh plastics. [ 107 ] [ 108 ] [ 109 ] In theory, this allows for near infinite recycling; as impurities, additives, dyes and chemical defects are completely removed with ...

  3. Polymer degradation - Wikipedia

    en.wikipedia.org/wiki/Polymer_degradation

    Polymer degradation is the reduction in the physical properties of a polymer, such as strength, caused by changes in its chemical composition.Polymers and particularly plastics are subject to degradation at all stages of their product life cycle, including during their initial processing, use, disposal into the environment and recycling. [1]

  4. Polymer stabilizer - Wikipedia

    en.wikipedia.org/wiki/Polymer_stabilizer

    Stabilizers are used at all stages of the polymer life-cycle. They allow plastic items to be produced faster and with fewer defects, extend their useful lifespan, and facilitate their recycling. [1] However they also continue to stabilise waste plastic, causing it to remain in the environment for longer. Many different types of plastic exist ...

  5. Is recycling worth it? - AOL

    www.aol.com/news/recycling-worth-201534869.html

    Plastic is loaded onto a conveyer belt at ExxonMobil’s Baytown, Texas, chemical recycling plant in October 2023. Elon Musk, the world’s richest man, said earlier this month that recycling is ...

  6. Low-density polyethylene - Wikipedia

    en.wikipedia.org/wiki/Low-density_polyethylene

    LDPE has SPI resin ID code 4 Schematic of LDPE branching structure. Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene.It was the first grade of polyethylene, produced in 1933 by John C. Swallow and M.W Perrin who were working for Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization. [1]

  7. Polyethylene terephthalate - Wikipedia

    en.wikipedia.org/wiki/Polyethylene_terephthalate

    Significant investments were announced in 2021 and 2022 for chemical recycling of PET by glycolysis, methanolysis, [73] [74] and enzymatic recycling [75] to recover monomers. Initially these will also use bottles as feedstock but it is expected that fibres will also be recycled this way in future. [76]