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US 12,180,149 B2Granted
Depolymerization of oligomers and polymers comprising cyclobutane units
AssigneeThe Trustees of Princeton University
InventorsPaul J. Chirik, C. Rose Kennedy, Megan Mohadjer Beromi
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Abstract
Methods of polymer and/or oligomer depolymerization are described herein which, in some embodiments, enable facile polymer and/or oligomer decomposition under mild, non-energy intensive conditions. Briefly, a method of depolymerization comprises providing a reaction mixture comprising a transition metal catalyst, and a polymer or oligomer having a backbone including cyclobutane units, and decomposing the polymer or oligomer to provide diene monomer or alkene monomer.
Claims20
A method of depolymerization comprising:
- providing a reaction mixture comprising a transition metal catalyst, and a polymer or oligomer having a backbone including cyclobutane units;
- and
- depolymerizing the polymer or oligomer to provide diene monomer or alkene monomer, wherein the transition metal catalyst is of Formula (I):
- wherein M is selected from the group consisting of iron, cobalt and nickel and wherein R1-R7 are independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl and heteroaryl, wherein the alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl and heteroaryl are optionally substituted with one or more substituents selected from the group consisting of (C1-C10)-alkyl, (C1-C10)-alkenyl, alkoxy, halo and hydroxyl;
- and wherein L is selected from the group consisting of halo, N2, alkene/diene, carboxylate and CO;
- and n is 1 or 2.
3 more elements
Dependencies are inferred from the claim text.