{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/129354"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/129354","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Characterization of poly(dicyclopentadiene-co-dihydrofuran) polymers and composites: A frontally polymerizable and deconstructable thermoset","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms","abstract_has_math":false,"creators":["Bagare, Saurabh Vijay"],"institution":"University of Illinois Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Baur, Jeffery W.","Moore, Jeffrey S."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-05-09","date_published":"2025-05-09","updated_at":"2026-07-22T22:25:05Z","subjects":["Frontal Polymerization","Deconstructible Thermosets","Recyclable Composites","Dihydrofuran"],"languages":["en","eng"],"rights":["Copyright 2025 Saurabh Bagare"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/129354","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Baur, Jeffery W.","Moore, Jeffrey S."]},{"key":"dc:creator","label":"Author","values":["Bagare, Saurabh Vijay"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-05-09","2025-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Aerospace Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Frontal Polymerization","Deconstructible Thermosets","Recyclable Composites","Dihydrofuran"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2025 Saurabh Bagare"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/129354"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms","The student, Saurabh Bagare, accepted the attached license on 2025-05-09 at 15:10.","The student, Saurabh Bagare, submitted this Thesis for approval on 2025-05-09 at 15:22.","This Thesis was approved for publication on 2025-05-09 at 15:31.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22289 on 2025-10-19 at 18:14:05","The deconstruction of frontally polymerized poly(dicyclopentadiene) (pDCPD) has previously been achieved by the addition of the comonomer 2,3-dihydrofuran (DHF), introducing enol ether linkages which are cleavable via acid hydrolysis. Although the addition of DHF enables deconstruction, the comonomer inhibits the polymerization reaction and decreases the thermomechanical properties compared to pDCPD. To mitigate the inhibition and decrease in glass transition temperature (Tg) with the addition of DHF to DCPD, this thesis investigates the effects of increasing the concentration of the initiator. The effect of monomer formulation on the front speed, front temperature, Tg, storage modulus (E'), and pot-life (gel time) is highlighted. Furthermore, extrusion of thin (~1.5 mm diameter) filaments using direct ink writing (DIW) at different DHF and initiator concentrations, and bed temperature was performed. The cured resin samples were completely deconstructed at various formulation combinations when kept under inert conditions. Composite laminates consisting of poly(dicyclopentadiene-co-dihydrofuran) and Hexcel AS4C carbon fibers with glass transition temperatures over 140 °C, E' over 35 GPa, and fiber volume fraction (vf) > 50% were manufactured using Vacuum Assisted Resin Transfer Molding (VARTM) process, and were deconstructed to reclaim fibers. Reclaimed fibers were reused to make the next generation composite, for up to three successive generations. Contact angle tests, X-ray photoelectron spectroscopy, and dynamic mechanical analysis (DMA) revealed no significant change in the chemical nature of the fiber surface and the thermomechanical properties of the composite with successive deconstruction and reuse cycles."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Characterization of poly(dicyclopentadiene-co-dihydrofuran) polymers and composites: A frontally polymerizable and deconstructable thermoset"]}]}],"canonical_facts":{"dc:contributor":["Baur, Jeffery W.","Moore, Jeffrey S."],"dc:creator":["Bagare, Saurabh Vijay"],"dc:date":["2025-05-09","2025-05"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms","The student, Saurabh Bagare, accepted the attached license on 2025-05-09 at 15:10.","The student, Saurabh Bagare, submitted this Thesis for approval on 2025-05-09 at 15:22.","This Thesis was approved for publication on 2025-05-09 at 15:31.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22289 on 2025-10-19 at 18:14:05","The deconstruction of frontally polymerized poly(dicyclopentadiene) (pDCPD) has previously been achieved by the addition of the comonomer 2,3-dihydrofuran (DHF), introducing enol ether linkages which are cleavable via acid hydrolysis. Although the addition of DHF enables deconstruction, the comonomer inhibits the polymerization reaction and decreases the thermomechanical properties compared to pDCPD. To mitigate the inhibition and decrease in glass transition temperature (Tg) with the addition of DHF to DCPD, this thesis investigates the effects of increasing the concentration of the initiator. The effect of monomer formulation on the front speed, front temperature, Tg, storage modulus (E'), and pot-life (gel time) is highlighted. Furthermore, extrusion of thin (~1.5 mm diameter) filaments using direct ink writing (DIW) at different DHF and initiator concentrations, and bed temperature was performed. The cured resin samples were completely deconstructed at various formulation combinations when kept under inert conditions. Composite laminates consisting of poly(dicyclopentadiene-co-dihydrofuran) and Hexcel AS4C carbon fibers with glass transition temperatures over 140 °C, E' over 35 GPa, and fiber volume fraction (vf) > 50% were manufactured using Vacuum Assisted Resin Transfer Molding (VARTM) process, and were deconstructed to reclaim fibers. Reclaimed fibers were reused to make the next generation composite, for up to three successive generations. Contact angle tests, X-ray photoelectron spectroscopy, and dynamic mechanical analysis (DMA) revealed no significant change in the chemical nature of the fiber surface and the thermomechanical properties of the composite with successive deconstruction and reuse cycles."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/129354"],"dc:language":["en","eng"],"dc:rights":["Copyright 2025 Saurabh Bagare"],"dc:subject":["Frontal Polymerization","Deconstructible Thermosets","Recyclable Composites","Dihydrofuran"],"dc:title":["Characterization of poly(dicyclopentadiene-co-dihydrofuran) polymers and composites: A frontally polymerizable and deconstructable thermoset"],"dc:type":["text"],"thesis:degree_discipline":["Aerospace Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:05Z"}