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Depolymerization of End‐of‐Life Poly(bisphenol A carbonate) via Alkali‐Metal‐Halide‐Catalyzed Methanolysis
Author(s) -
Alberti Christoph,
Enthaler Stephan
Publication year - 2020
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201900242
Subject(s) - depolymerization , chemistry , bisphenol a , dimethyl carbonate , carbonate , bisphenol , tetrabromobisphenol a , polymerization , polymer chemistry , catalysis , organic chemistry , monomer , methanol , polymer , inorganic chemistry , fire retardant , epoxy
Chemical recycling, composed of depolymerization and polymerization, of end‐of‐life polymers (plastics) can contribute to a sustainable and resource‐conserving society. In this respect, we have installed a straightforward procedure for the first step (depolymerization) of the chemical recycling of end‐of‐life poly(bisphenol A carbonate). Operating with a combination of methanol and catalytic amounts of potassium fluoride end‐of‐life poly(bisphenol A carbonate) was depolymerized to the building blocks bisphenol A and dimethyl carbonate. With the assistance of microwave heating, an excellent rate of depolymerization (>99%) was observed within short reaction times (5 min) and turnover frequencies up to ∼1844 h −1 were realized. Noteworthly, bisphenol A and dimethyl carbonate could be applied as monomers for new poly(bisphenol A carbonate), therefore a closed cycle for poly(bisphenol A carbonate) is feasible.