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The Degradation Product Promoted Depolymerization Strategy for Chemical Recycling of Poly(bisphenol a Carbonate)
Summary
Researchers developed a degradation product-promoted depolymerization strategy for chemically recycling poly(bisphenol A carbonate) (BPA-PC) using N,N'-dimethyl-ethylenediamine (DMEDA) as a reagent under mild conditions without catalysts or auxiliary solvents, finding that the degradation product DMI acts as a critical facilitator of the depolymerization process.
The accumulation of waste plastics has a severe impact on the environment, and therefore, the development of efficient chemical recycling methods has become an extremely important task. In this regard, a new strategy of degradation product-promoted depolymerization process was proposed. Using N,N'-dimethyl-ethylenediamine (DMEDA) as depolymerization reagent, an efficient chemical recycling of poly(bisphenol A carbonate) (BPA-PC) material was achieved under mild conditions. The degradation product 1,3-dimethyl-2-imidazolidinone (DMI) was proven to be the critical factor in facilitating the depolymerization process. This strategy does not require catalysts or auxiliary solvents, which is truly green process. This method improves the recycling efficiency of BPA-PC and promotes the development of plastic reutilization.