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Low Tc Thiolactone Monomers for Chemically Recyclable Polythioesters
Low Tc Thiolactone Monomers for Chemically Recyclable Polythioesters
Low Tc Thiolactone Monomers for Chemically Recyclable Polythioesters

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105327
ISBN  
9798263325503
DDC  
600
저자명  
Stellmach, Kellie Anne.
서명/저자  
Low Tc Thiolactone Monomers for Chemically Recyclable Polythioesters
발행사항  
[Sl] : Georgia Institute of Technology, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
244 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
주기사항  
Advisor: Gutekunst, Will.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2025.
초록/해제  
요약This thesis investigates the polymerization thermodynamics of thiolactones, focusing on their potential for chemical recycling to monomer (CRM). Chapter 2 examines a series of six-membered thiolactone derivatives, where methyl substitution and sulfur incorporation are used to modulate enthalpy, entropy, and ceiling temperature (Tc). Polymerization experiments and variable-temperature NMR reveal how structural changes impact polymerizability, while computational studies highlight the role of ring strain and conformation. Chapter 3 identifies common sources of error in Tc measurements, including incorrectly assigned entropy values, limited conversion ranges, and cyclic oligomer formation. Using Me₂-DTN as a model system, the chapter provides practical guidance for improving the accuracy and reproducibility of experimental Tc determinations. Chapter 4 examines the synthesis and characterization of chemically recyclable crosslinked polythioester networks, transitioning from linear to network polymers to enhance mechanical properties. The chapter also explores cyclic polythioester polymer formation via DBU initiation and the use of a dilipoate (DiLp) crosslinker to simplify synthesis and improve gel fraction. Together, these studies offer a framework for designing and characterizing low Tc monomers that support efficient chemical recycling.
일반주제명  
Mechanical properties
일반주제명  
Polymers
일반주제명  
Mass spectrometry
일반주제명  
Thermodynamics
일반주제명  
Recycling
일반주제명  
Nuclear magnetic resonance--NMR
일반주제명  
Solvents
일반주제명  
Polymerization
일반주제명  
Sulfur
일반주제명  
Crystallization
일반주제명  
Design
일반주제명  
Molecular weight
일반주제명  
Scientific imaging
일반주제명  
Chromatography
일반주제명  
Entropy
일반주제명  
Analytical chemistry
일반주제명  
Mechanics
일반주제명  
Medical imaging
일반주제명  
Polymer chemistry
일반주제명  
Sustainability
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05A.
전자적 위치 및 접속  
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MARC

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■1001  ▼aStellmach,  Kellie  Anne.
■24510▼aLow  Tc  Thiolactone  Monomers  for  Chemically  Recyclable  Polythioesters
■260    ▼a[Sl]▼bGeorgia  Institute  of  Technology▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a244  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  A.
■500    ▼aAdvisor:  Gutekunst,  Will.
■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2025.
■520    ▼aThis  thesis  investigates  the  polymerization  thermodynamics  of  thiolactones,  focusing  on  their  potential  for  chemical  recycling  to  monomer  (CRM).  Chapter  2  examines  a  series  of  six-membered  thiolactone  derivatives,  where  methyl  substitution  and  sulfur  incorporation  are  used  to  modulate  enthalpy,  entropy,  and  ceiling  temperature  (Tc).  Polymerization  experiments  and  variable-temperature  NMR  reveal  how  structural  changes  impact  polymerizability,  while  computational  studies  highlight  the  role  of  ring  strain  and  conformation.  Chapter  3  identifies  common  sources  of  error  in  Tc  measurements,  including  incorrectly  assigned  entropy  values,  limited  conversion  ranges,  and  cyclic  oligomer  formation.  Using  Me₂-DTN  as  a  model  system,  the  chapter  provides  practical  guidance  for  improving  the  accuracy  and  reproducibility  of  experimental  Tc  determinations.  Chapter  4  examines  the  synthesis  and  characterization  of  chemically  recyclable  crosslinked  polythioester  networks,  transitioning  from  linear  to  network  polymers  to  enhance  mechanical  properties.  The  chapter  also  explores  cyclic  polythioester  polymer  formation  via  DBU  initiation  and  the  use  of  a  dilipoate  (DiLp)  crosslinker  to  simplify  synthesis  and  improve  gel  fraction.  Together,  these  studies  offer  a  framework  for  designing  and  characterizing  low  Tc  monomers  that  support  efficient  chemical  recycling.
■590    ▼aSchool  code:  0078.
■650  4▼aMechanical  properties
■650  4▼aPolymers
■650  4▼aMass  spectrometry
■650  4▼aThermodynamics
■650  4▼aRecycling
■650  4▼aNuclear  magnetic  resonance--NMR
■650  4▼aSolvents
■650  4▼aPolymerization
■650  4▼aSulfur
■650  4▼aCrystallization
■650  4▼aDesign
■650  4▼aMolecular  weight
■650  4▼aScientific  imaging
■650  4▼aChromatography
■650  4▼aEntropy
■650  4▼aAnalytical  chemistry
■650  4▼aMechanics
■650  4▼aMedical  imaging
■650  4▼aPolymer  chemistry
■650  4▼aSustainability
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■71020▼aGeorgia  Institute  of  Technology.
■7730  ▼tDissertations  Abstracts  International▼g87-05A.
■790    ▼a0078
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360245▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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