University of Illinois Urbana-Champaign

Strategies of programmed deconstruction for sustainable polymeric materials

Davydovich, Oleg

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DAVYDOVICH-DISSERTATION-2022.pdf

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https://hdl.handle.net/2142/116025

Description

Title
Strategies of programmed deconstruction for sustainable polymeric materials
Author(s)
Davydovich, Oleg
Issue Date
2022-06-03
Director of Research (if dissertation) or Advisor (if thesis)
Moore, Jeffrey S
Doctoral Committee Chair(s)
Moore, Jeffrey S
Committee Member(s)
  • Sottos, Nancy R
  • Rodiguez-Lopez, Joaquin
  • Evans, Christopher M
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • Depolymerization
  • Transient Polymers
  • Thermosets
  • Electrochemical Depolymerization
Abstract
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.
Graduation Semester
2022-08
Type of Resource
Thesis
Handle URL
https://hdl.handle.net/2142/116025
Copyright and License Information
© 2022 Oleg Davydovich

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Graduate Theses and Dissertations at Illinois