Polymer Deconstructability and Recyclability via Introduction of Cleavable Si−O Bonds

The synthesis of a new polysilylether via entropy-driven ring-opening metathesis polymerization (ED-ROMP) of cyclic bifunctional silyl ether-based monomers is reported. High molecular weight polymers (up to 100 k) with narrow dispersities were achieved at modest temperature. These polymers display excellent thermal stability and ultra-low T_g (–88 ºC). The polymers are both rapidly deconstructable via the cleavage of the labile silicon-oxygen linkages with either acid or fluoride triggers and partially depolymerizable by the addition of exogenous metathesis catalyst. Analysis of the deconstructed polymer products provided insight into the polymer microstructure, showing that the ED-ROMP process was regiorandom. Altogether, this work offers a new class of deconstructable polymers with a range of potential applications. Incorporation of these bifunctional silyl ether-based monomers into copolymers could aid in the triggered deconstruction of otherwise nondegradable hydrocarbon backbones.

Name thesis:degree_name

Master

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Chemistry

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2025

Author dc:creator

• Johnson, Alayna

Advisor dc:contributor.advisor

• Willard, Adam P.

Statement dc:rights

• In Copyright - Educational Use Permitted
• Copyright retained by author(s)

Licence dc:rights.uri

• https://rightsstatements.org/page/InC-EDU/1.0/

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/158921

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/158921