Dynamic Colloidal Processes In Waterborne Two-Component Polyurethanes and Their Effects On Solution and Film Morphology
While waterborne two-component polyurethanes (WB 2K-PURs) offer an attractive approach toward the reduction of volatile organic compounds (VOC), a number of fundamental processes related to the colloidal stability and solution morphology of WB 2K-PUR reactive dispersions are not understood. These st...
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The Aquila Digital Community
2005
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ftsouthmissispun:oai:aquila.usm.edu:fac_pubs-3730 2023-07-30T04:02:55+02:00 Dynamic Colloidal Processes In Waterborne Two-Component Polyurethanes and Their Effects On Solution and Film Morphology Otts, Daniel B. Pereira, Kevin J. Jarret, William L. Urban, Marek W. 2005-06-17T07:00:00Z https://aquila.usm.edu/fac_pubs/2731 http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0032386105004180/1-s2.0-S0032386105004180-main.pdf?_tid=b201a422-d3af-11e2-81fd-00000aab0f01&acdnat=1371076413_e099c0a572f3f0d47e431ef24fc652e0 unknown The Aquila Digital Community https://aquila.usm.edu/fac_pubs/2731 http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0032386105004180/1-s2.0-S0032386105004180-main.pdf?_tid=b201a422-d3af-11e2-81fd-00000aab0f01&acdnat=1371076413_e099c0a572f3f0d47e431ef24fc652e0 Faculty Publications waterborne two-component polyurethanes film formation spectroscopy Chemistry Physical Sciences and Mathematics text 2005 ftsouthmissispun 2023-07-15T18:58:44Z While waterborne two-component polyurethanes (WB 2K-PURs) offer an attractive approach toward the reduction of volatile organic compounds (VOC), a number of fundamental processes related to the colloidal stability and solution morphology of WB 2K-PUR reactive dispersions are not understood. These studies focus on mechanisms of inter-particle reactant aggregation in heterogeneous aqueous dispersions resulting from solution morphological changes of poly(ethylene glycol) modified water-dispersible polyisocyanates (WDPI) and water-reducible polyester polyol coreactants, as revealed by particle size measurements and in situ NMR T-2 studies. Based on the results of these experiments, a model of film formation is proposed which relates solution morphological features and chemical reactions. WDPI reactant droplets become hydrated over time, leading to formation of carbon dioxide, which dissolves in the aqueous continuum as carbonic acid and subsequently destabilizes anionically stabilized polyol droplets, resulting in their adsorption to WDPI droplet surfaces. The implications of polyol collapse, as they pertain to film formation, are discussed in the context of solution and film morphologies. (c) 2005 Elsevier Ltd. All rights reserved. Text Carbonic acid The University of Southern Mississippi: The Aquila Digital Community |
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The University of Southern Mississippi: The Aquila Digital Community |
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ftsouthmissispun |
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topic |
waterborne two-component polyurethanes film formation spectroscopy Chemistry Physical Sciences and Mathematics |
spellingShingle |
waterborne two-component polyurethanes film formation spectroscopy Chemistry Physical Sciences and Mathematics Otts, Daniel B. Pereira, Kevin J. Jarret, William L. Urban, Marek W. Dynamic Colloidal Processes In Waterborne Two-Component Polyurethanes and Their Effects On Solution and Film Morphology |
topic_facet |
waterborne two-component polyurethanes film formation spectroscopy Chemistry Physical Sciences and Mathematics |
description |
While waterborne two-component polyurethanes (WB 2K-PURs) offer an attractive approach toward the reduction of volatile organic compounds (VOC), a number of fundamental processes related to the colloidal stability and solution morphology of WB 2K-PUR reactive dispersions are not understood. These studies focus on mechanisms of inter-particle reactant aggregation in heterogeneous aqueous dispersions resulting from solution morphological changes of poly(ethylene glycol) modified water-dispersible polyisocyanates (WDPI) and water-reducible polyester polyol coreactants, as revealed by particle size measurements and in situ NMR T-2 studies. Based on the results of these experiments, a model of film formation is proposed which relates solution morphological features and chemical reactions. WDPI reactant droplets become hydrated over time, leading to formation of carbon dioxide, which dissolves in the aqueous continuum as carbonic acid and subsequently destabilizes anionically stabilized polyol droplets, resulting in their adsorption to WDPI droplet surfaces. The implications of polyol collapse, as they pertain to film formation, are discussed in the context of solution and film morphologies. (c) 2005 Elsevier Ltd. All rights reserved. |
format |
Text |
author |
Otts, Daniel B. Pereira, Kevin J. Jarret, William L. Urban, Marek W. |
author_facet |
Otts, Daniel B. Pereira, Kevin J. Jarret, William L. Urban, Marek W. |
author_sort |
Otts, Daniel B. |
title |
Dynamic Colloidal Processes In Waterborne Two-Component Polyurethanes and Their Effects On Solution and Film Morphology |
title_short |
Dynamic Colloidal Processes In Waterborne Two-Component Polyurethanes and Their Effects On Solution and Film Morphology |
title_full |
Dynamic Colloidal Processes In Waterborne Two-Component Polyurethanes and Their Effects On Solution and Film Morphology |
title_fullStr |
Dynamic Colloidal Processes In Waterborne Two-Component Polyurethanes and Their Effects On Solution and Film Morphology |
title_full_unstemmed |
Dynamic Colloidal Processes In Waterborne Two-Component Polyurethanes and Their Effects On Solution and Film Morphology |
title_sort |
dynamic colloidal processes in waterborne two-component polyurethanes and their effects on solution and film morphology |
publisher |
The Aquila Digital Community |
publishDate |
2005 |
url |
https://aquila.usm.edu/fac_pubs/2731 http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0032386105004180/1-s2.0-S0032386105004180-main.pdf?_tid=b201a422-d3af-11e2-81fd-00000aab0f01&acdnat=1371076413_e099c0a572f3f0d47e431ef24fc652e0 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Faculty Publications |
op_relation |
https://aquila.usm.edu/fac_pubs/2731 http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0032386105004180/1-s2.0-S0032386105004180-main.pdf?_tid=b201a422-d3af-11e2-81fd-00000aab0f01&acdnat=1371076413_e099c0a572f3f0d47e431ef24fc652e0 |
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