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US 2026/0109834 A1Published application
Polymers and Methods of Depolymerization of Polymers Using Chain-End Initiation
OwnerBrent S. SUMERLIN, John B. GARRISON +2inventors
InventorsBrent S. SUMERLIN, John B. GARRISON, James Bailey YOUNG, Rhys William HUGHES
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Abstract
The present disclosure provides for bulk depolymerization of polymers at significantly lower temperatures than possible through currently available methods. The present disclosure provides for polymers and modified polymers that include at least one thermolytically labile end-group.
Claims20
A composition comprising:
- a polymer having at least one of an α-chain end group (V) and an ω-chain end group (W), wherein V is selected from:
- wherein W is selected from:
- where the dashed line is the bond to the polymer, wherein x is 1 to 15, wherein each of R, R1, R2, R3, R4, R5, R6, and R7 are independently selected from:
- H, an alkyl group, halogen, —CN group, —NO2 group, —O-alkyl group, an aryl group.
1 more element
A method of depolymerization of a polymer comprising:
- adding at least one of an α-chain end group (V) and/or an ω-chain end group (W) to the polymer to form a modified polymer, wherein V is selected from:
- wherein W is selected from:
- where the dashed line is the bond to the polymer, each of R, R1, R2, R3, R4, R5, R6, and R7 are independently selected from:
- H, an alkyl group, halogen, —CN group, —NO2 group, —O-alkyl group, an aryl group,
- heating the modified polymer to about 180 to 300° C.;
- and
- depolymerization of the modified polymer, wherein about 90% of the monomer units are recovered.
4 more elements
Dependencies are inferred from the claim text.