A chemo-mechanical model for describing sorption hysteresis in a glassy polyurethane
Abstract Hysteretic sorption and desorption of water is observed from 0 to 95% relative humidity and 298–333 K on a glassy polyurethane foam. It is postulated that sorption-induced swelling of the glassy polyurethane increases the concentration of accessible hydrogen-bonding adsorption sites for wat...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-03-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-56069-3 |
| _version_ | 1797266824210939904 |
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| author | Brandon L. Foley Sarah M. Matt Stephen T. Castonguay Yunwei Sun Pratanu Roy Elizabeth A. Glascoe Hom N. Sharma |
| author_facet | Brandon L. Foley Sarah M. Matt Stephen T. Castonguay Yunwei Sun Pratanu Roy Elizabeth A. Glascoe Hom N. Sharma |
| author_sort | Brandon L. Foley |
| collection | DOAJ |
| description | Abstract Hysteretic sorption and desorption of water is observed from 0 to 95% relative humidity and 298–333 K on a glassy polyurethane foam. It is postulated that sorption-induced swelling of the glassy polyurethane increases the concentration of accessible hydrogen-bonding adsorption sites for water. The accessibility of sites is kinetically controlled due to the restricted thermal motions of chains in the glassy polymer, causing a difference in accessible site concentrations during sorption and desorption. This discrepancy leads to hysteresis in the sorbed concentrations of water. A coupled chemo-mechanical model relating volumetric strain, adsorption site concentration, and sorbed water concentration is employed to describe water sorption hysteresis in the glassy polyurethane. This model not only describes the final mass uptake for each relative humidity step, but also captures the dynamics of water uptake, which exhibit diffusion and relaxation rate-controlled regimes. |
| first_indexed | 2024-04-25T01:06:49Z |
| format | Article |
| id | doaj.art-272ee51efb18412fa82be059f07d8409 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-25T01:06:49Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-272ee51efb18412fa82be059f07d84092024-03-10T12:11:21ZengNature PortfolioScientific Reports2045-23222024-03-0114111610.1038/s41598-024-56069-3A chemo-mechanical model for describing sorption hysteresis in a glassy polyurethaneBrandon L. Foley0Sarah M. Matt1Stephen T. Castonguay2Yunwei Sun3Pratanu Roy4Elizabeth A. Glascoe5Hom N. Sharma6Lawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryAbstract Hysteretic sorption and desorption of water is observed from 0 to 95% relative humidity and 298–333 K on a glassy polyurethane foam. It is postulated that sorption-induced swelling of the glassy polyurethane increases the concentration of accessible hydrogen-bonding adsorption sites for water. The accessibility of sites is kinetically controlled due to the restricted thermal motions of chains in the glassy polymer, causing a difference in accessible site concentrations during sorption and desorption. This discrepancy leads to hysteresis in the sorbed concentrations of water. A coupled chemo-mechanical model relating volumetric strain, adsorption site concentration, and sorbed water concentration is employed to describe water sorption hysteresis in the glassy polyurethane. This model not only describes the final mass uptake for each relative humidity step, but also captures the dynamics of water uptake, which exhibit diffusion and relaxation rate-controlled regimes.https://doi.org/10.1038/s41598-024-56069-3Glassy polymersSorption hysteresisPolymer relaxationBerens–Hopfenberg kinetics |
| spellingShingle | Brandon L. Foley Sarah M. Matt Stephen T. Castonguay Yunwei Sun Pratanu Roy Elizabeth A. Glascoe Hom N. Sharma A chemo-mechanical model for describing sorption hysteresis in a glassy polyurethane Scientific Reports Glassy polymers Sorption hysteresis Polymer relaxation Berens–Hopfenberg kinetics |
| title | A chemo-mechanical model for describing sorption hysteresis in a glassy polyurethane |
| title_full | A chemo-mechanical model for describing sorption hysteresis in a glassy polyurethane |
| title_fullStr | A chemo-mechanical model for describing sorption hysteresis in a glassy polyurethane |
| title_full_unstemmed | A chemo-mechanical model for describing sorption hysteresis in a glassy polyurethane |
| title_short | A chemo-mechanical model for describing sorption hysteresis in a glassy polyurethane |
| title_sort | chemo mechanical model for describing sorption hysteresis in a glassy polyurethane |
| topic | Glassy polymers Sorption hysteresis Polymer relaxation Berens–Hopfenberg kinetics |
| url | https://doi.org/10.1038/s41598-024-56069-3 |
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