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How does chemical recycling of PLA work?

Chemical recycling, also known as feedstock recovery or tertiary recycling, is a process where plastics are converted into monomers, oligomers or hydrocarbons that can be used again to produce virgin polymers. There are two different forms of chemical recycling being investigated thermal depolymerization and chemical depolymerization. Thermal depolymerization, also known as cracking or pyrolysis, can be used for polyolefins like PE or PP. It is an energy intensive process that requires large, high-investment facilities to operate cost efficiently. Chemical depolymerization can be used for polyesters like PET and PLA. In the case of PLA, the chemical depolymerization process is a simple hydrolyzation which can be relatively easily performed in small scale facilities.

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