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Thermomechanical Behavior of Disulfide-Containing Polymer Glasses and Composites
Thermomechanical Behavior of Disulfide-Containing Polymer Glasses and Composites
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104839
- ISBN
- 9798291586822
- DDC
- 531
- 서명/저자
- Thermomechanical Behavior of Disulfide-Containing Polymer Glasses and Composites
- 발행사항
- [Sl] : Northwestern University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 199 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Shull, Kenneth R.
- 학위논문주기
- Thesis (Ph.D.)--Northwestern University, 2025.
- 초록/해제
- 요약Covalent adaptable networks hold the potential to revolutionize the sustainable use of thermoset polymers. The combination of the thermomechanical and chemical robustness characteristic of crosslinked thermosets with the reprocessability/healability/weldability typically characteristic of thermoplastics provides the opportunity to have the best of both worlds when it comes to performance and sustainability; however, thorough characterization is needed to ensure that improving sustainability through inclusion of dynamic covalent bonds does not compromise properties of importance to applications. To this end, the thermomechanical properties of a model system of disulfide-containing high performance epoxy thermosets were measured using a variety of methods and analyzed in the context of microstructural and viscoelastic changes induced by dynamic bond inclusion. Increasing disulfide bond inclusion tended to decrease the material's glass transition temperature, increase the mass density, decrease the excess free volume, and increase the intensity of a new glassy relaxation mechanism. Overall this resulted in optimal thermomechanical properties at low-intermediate disulfide concentrations, especially those with high disulfide concentration in the diamine crosslinker, but low concentration in the diepoxide. Design concepts were extended to highly filled composites for lunar construction applications as a proof-of-concept and to polyimide materials. The developed structure-property relationships for covalent adaptable networks, especially as a function of dynamic covalent bond concentration and topological placement, can be extended to other material systems in the future.
- 일반주제명
- Mechanics
- 일반주제명
- Polymer chemistry
- 일반주제명
- Materials science
- 일반주제명
- Thermodynamics
- 키워드
- Disulfide bond
- 키워드
- Epoxy thermosets
- 키워드
- Polymer glass
- 기타저자
- Northwestern University Materials Science and Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798291586822
■035 ▼a(MiAaPQ)AAI32172207
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a531
■1001 ▼aLewis, Broderick.▼0(orcid)0009-0009-4607-7939
■24510▼aThermomechanical Behavior of Disulfide-Containing Polymer Glasses and Composites
■260 ▼a[Sl]▼bNorthwestern University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a199 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Shull, Kenneth R.
■5021 ▼aThesis (Ph.D.)--Northwestern University, 2025.
■520 ▼aCovalent adaptable networks hold the potential to revolutionize the sustainable use of thermoset polymers. The combination of the thermomechanical and chemical robustness characteristic of crosslinked thermosets with the reprocessability/healability/weldability typically characteristic of thermoplastics provides the opportunity to have the best of both worlds when it comes to performance and sustainability; however, thorough characterization is needed to ensure that improving sustainability through inclusion of dynamic covalent bonds does not compromise properties of importance to applications. To this end, the thermomechanical properties of a model system of disulfide-containing high performance epoxy thermosets were measured using a variety of methods and analyzed in the context of microstructural and viscoelastic changes induced by dynamic bond inclusion. Increasing disulfide bond inclusion tended to decrease the material's glass transition temperature, increase the mass density, decrease the excess free volume, and increase the intensity of a new glassy relaxation mechanism. Overall this resulted in optimal thermomechanical properties at low-intermediate disulfide concentrations, especially those with high disulfide concentration in the diamine crosslinker, but low concentration in the diepoxide. Design concepts were extended to highly filled composites for lunar construction applications as a proof-of-concept and to polyimide materials. The developed structure-property relationships for covalent adaptable networks, especially as a function of dynamic covalent bond concentration and topological placement, can be extended to other material systems in the future.
■590 ▼aSchool code: 0163.
■650 4▼aMechanics
■650 4▼aPolymer chemistry
■650 4▼aMaterials science
■650 4▼aThermodynamics
■653 ▼aCovalent adaptable networks
■653 ▼aDisulfide bond
■653 ▼aEpoxy thermosets
■653 ▼aFracture mechanics
■653 ▼aLunar construction
■653 ▼aPolymer glass
■690 ▼a0794
■690 ▼a0346
■690 ▼a0495
■690 ▼a0348
■71020▼aNorthwestern University▼bMaterials Science and Engineering.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0163
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359128▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
