Journal
CHEMSUSCHEM
Volume 8, Issue 6, Pages 980-984Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201500054
Keywords
depolymerization; homogeneous catalysis; hydrosilylation; polyesters; recycling
Funding
- CEA
- CNRS
- CHARMMMAT Laboratory of Excellence
- European Research Council (ERC) [336467]
- Fondation Louis D.-Institut de France
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The reductive depolymerization of a variety of polymeric materials based on polyethers, polyesters, and polycarbonates is described using hydrosilanes as reductants and metal-free catalysts. This strategy enables the selective depolymerization of waste polymers as well as bio-based polyesters to functional chemicals such as alcohols and phenols at room temperature. Commercially available B(C6F5)(3) and [Ph3C+,B(C6F5)(4)(-)] catalysts are active hydrosilylation catalysts in this procedure and they are compatible with the use of inexpensive and air-stable polymethylhydrosiloxane and tetramethyldisiloxane as reductants. A significant advantage of this recycling method is derived from its tolerance to the additives present in waste plastics and its ability to selectively depolymerize mixtures of polymers.
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