{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/82473"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/82473","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The Rheology of Anionic Aqueous Polyurethane Dispersions","abstract":"Driven by environmental regulations, water-borne coatings and adhesives are of steadily growing importance. One system being developed to satisfy this need is aqueous polyurethane. Aqueous polyurethane particles have a very unique structure, which lies somewhere between that of polymer chains and traditional colloidal particles. In this fundamental study, we attempt to characterize and understand the flow behavior of these unique electrostatically stabilized polymer colloids from a colloidal perspective. We examine the rheological behavior of anionic aqueous polyurethane dispersions from the dilute to the concentrated regime. At dilute to intermediate concentrations these systems behave as standard electrostatically stabilized particles. However at higher concentrations, standard models for electrostatically stabilized hard particles fail at predicting both the magnitudes and the trends exhibited by these systems. The flow behavior observed for concentrated aqueous polyurethane systems is attributed to a complex interplay of electrostatics, sterics, and particle deformation. This study represents the first attempt to fully characterize and understand the rheological behavior of these systems from a fundamental perspective. The results of this study lay the ground work for future work, which should ultimately result in a more concise picture of the particle morphology and better more advance models for predicting the observed behavior.","abstract_html":"Driven by environmental regulations, water-borne coatings and adhesives are of steadily growing importance. One system being developed to satisfy this need is aqueous polyurethane. Aqueous polyurethane particles have a very unique structure, which lies somewhere between that of polymer chains and traditional colloidal particles. In this fundamental study, we attempt to characterize and understand the flow behavior of these unique electrostatically stabilized polymer colloids from a colloidal perspective. We examine the rheological behavior of anionic aqueous polyurethane dispersions from the dilute to the concentrated regime. At dilute to intermediate concentrations these systems behave as standard electrostatically stabilized particles. However at higher concentrations, standard models for electrostatically stabilized hard particles fail at predicting both the magnitudes and the trends exhibited by these systems. The flow behavior observed for concentrated aqueous polyurethane systems is attributed to a complex interplay of electrostatics, sterics, and particle deformation. This study represents the first attempt to fully characterize and understand the rheological behavior of these systems from a fundamental perspective. The results of this study lay the ground work for future work, which should ultimately result in a more concise picture of the particle morphology and better more advance models for predicting the observed behavior.","abstract_has_math":false,"creators":["Flickinger, Gregory Lee"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemical Engineering","degree_department":null,"school":null,"contributors":["Zukoski, Charles F."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T20:44:15Z","date_published":"2015-09-25T20:44:15Z","updated_at":"2026-07-22T22:26:18Z","subjects":["Engineering, Materials Science"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9953015"],"render_values":[{"text":"(MiAaPQ)AAI9953015","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/82473","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Zukoski, Charles F."]},{"key":"dc:creator","label":"Author","values":["Flickinger, Gregory Lee"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T20:44:15Z","10000-01-01","1999"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Materials Science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/82473","(MiAaPQ)AAI9953015"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Driven by environmental regulations, water-borne coatings and adhesives are of steadily growing importance. One system being developed to satisfy this need is aqueous polyurethane. Aqueous polyurethane particles have a very unique structure, which lies somewhere between that of polymer chains and traditional colloidal particles. In this fundamental study, we attempt to characterize and understand the flow behavior of these unique electrostatically stabilized polymer colloids from a colloidal perspective. We examine the rheological behavior of anionic aqueous polyurethane dispersions from the dilute to the concentrated regime. At dilute to intermediate concentrations these systems behave as standard electrostatically stabilized particles. However at higher concentrations, standard models for electrostatically stabilized hard particles fail at predicting both the magnitudes and the trends exhibited by these systems. The flow behavior observed for concentrated aqueous polyurethane systems is attributed to a complex interplay of electrostatics, sterics, and particle deformation. This study represents the first attempt to fully characterize and understand the rheological behavior of these systems from a fundamental perspective. The results of this study lay the ground work for future work, which should ultimately result in a more concise picture of the particle morphology and better more advance models for predicting the observed behavior.","Made available in DSpace on 2015-09-25T20:44:15Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9953015.pdf: 3378604 bytes, checksum: 002ac5e19ed4b7fff56617044c7beb97 (MD5) Previous issue date: 1999","Embargo set by: Seth Robbins for item 83754 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","188 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999."]},{"key":"dc:title","label":"Title","values":["The Rheology of Anionic Aqueous Polyurethane Dispersions"]}]}],"canonical_facts":{"dc:contributor":["Zukoski, Charles F."],"dc:creator":["Flickinger, Gregory Lee"],"dc:date":["2015-09-25T20:44:15Z","10000-01-01","1999"],"dc:description":["Driven by environmental regulations, water-borne coatings and adhesives are of steadily growing importance. One system being developed to satisfy this need is aqueous polyurethane. Aqueous polyurethane particles have a very unique structure, which lies somewhere between that of polymer chains and traditional colloidal particles. In this fundamental study, we attempt to characterize and understand the flow behavior of these unique electrostatically stabilized polymer colloids from a colloidal perspective. We examine the rheological behavior of anionic aqueous polyurethane dispersions from the dilute to the concentrated regime. At dilute to intermediate concentrations these systems behave as standard electrostatically stabilized particles. However at higher concentrations, standard models for electrostatically stabilized hard particles fail at predicting both the magnitudes and the trends exhibited by these systems. The flow behavior observed for concentrated aqueous polyurethane systems is attributed to a complex interplay of electrostatics, sterics, and particle deformation. This study represents the first attempt to fully characterize and understand the rheological behavior of these systems from a fundamental perspective. The results of this study lay the ground work for future work, which should ultimately result in a more concise picture of the particle morphology and better more advance models for predicting the observed behavior.","Made available in DSpace on 2015-09-25T20:44:15Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9953015.pdf: 3378604 bytes, checksum: 002ac5e19ed4b7fff56617044c7beb97 (MD5) Previous issue date: 1999","Embargo set by: Seth Robbins for item 83754 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","188 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999."],"dc:identifier":["http://hdl.handle.net/2142/82473","(MiAaPQ)AAI9953015"],"dc:language":["eng"],"dc:subject":["Engineering, Materials Science"],"dc:title":["The Rheology of Anionic Aqueous Polyurethane Dispersions"],"dc:type":["text"],"thesis:degree_discipline":["Chemical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:18Z"}