2026-09-20T04:25:02Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/116025 2023-07-11 col_2142_5131 col_2142_14789 com_2142_5130 com_2142_14788 com_2142_8903

Moore, Jeffrey S Moore, Jeffrey S Sottos, Nancy R Rodiguez-Lopez, Joaquin Evans, Christopher M 2022-08 application/pdf en text Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01 The student, Oleg Davydovich, accepted the attached license on 2022-05-26 at 10:50. The student, Oleg Davydovich, submitted this Dissertation for approval on 2022-05-26 at 11:21. This Dissertation was approved for publication on 2022-06-03 at 16:39. DSpace SAF Submission Ingestion Package generated from Vireo submission #18043 on 2022-11-15 at 19:16:12 Strategies of programmed deconstruction for sustainable polymeric materials Davydovich, Oleg 2022-06-03 Depolymerization Transient Polymers Thermosets Electrochemical Depolymerization Recent breakthroughs in materials chemistry have enabled the development of fully recyclable synthetic polymers and composites. Depolymerizable polymers, which are stable under ambient conditions and can be triggered to rapidly depolymerize by external stimuli such as heat, light, or chemical triggers, are finding broad applications in transient electronic devices, dynamic structural materials, and payload release systems. Low ceiling temperature polymers like cyclic poly(phthalaldehyde) are readily triggered to depolymerize via acid and heat, however these techniques are not easily accessible for on demand depolymerization. My work focuses on new methods of triggering transience via redox stimuli in cyclic poly(phthalaldehyde) materials and strategies of generating deconstructable thermosets via energy efficient frontal polymerization. Chapters 2 and 3 detail that cyclic poly(phthalaldehyde) can be readily depolymerized via oxidation through photochemical, electrochemical, and chemical stimuli. In chapter 4, we apply photoacid generators to generate photo-triggerable microcapsule for payload release systems. Chapter 5 focuses on using dihydrofuran comonomers for frontal ring opening metathesis polymerization of dicyclopentadiene thermosets. Dihydrofuran was found to have multifunctionality in FROMP, acting as both a potent inhibitor and as a cleavable moiety that enables thermoset deconstruction. The work detailed in chapters 2-5 has advanced methods of generating sustainable thermoplastic and thermoset materials and pave the way for new applications of recyclable materials. Thesis eng https://hdl.handle.net/2142/116025 © 2022 Oleg Davydovich Ph.D. Dissertation Chemistry University of Illinois at Urbana-Champaign Chemistry