Microscopic solvation structure and phase behavior of thermo-responsive polymers in ionic liquids

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dc.contributor.authorHirosawa, Ken_AU
dc.contributor.authorFujii, Ken_AU
dc.contributor.authorUeki, Ten_AU
dc.contributor.authorKitazawa, Yen_AU
dc.contributor.authorWatanabe, Men_AU
dc.contributor.authorGilbert, EPen_AU
dc.contributor.authorShibayama, Men_AU
dc.date.accessioned2021-08-09T22:40:56Zen_AU
dc.date.available2021-08-09T22:40:56Zen_AU
dc.date.issued2017-07-12en_AU
dc.date.statistics2021-08-08en_AU
dc.description.abstractIonic liquids (ILs) are molten salts having their melting points near room temperature. ILs consist of only ion species, and thus they exhibit unique solvent properties such as high ion conductivity, negligible volatility and nonflammability. Recently,it was reported that poly(benzyl methacrylate) (PBnMA) and its derivatives show a lower critical solution temperature type phase separation in ILs. Interestingly, the phase separation temperature of the thermo-responsive polymers in IL systems strongly depends on both chemical structures of the polymer and the ILs. It indicates that macroscopic phase behavior of the systems is strongly affected by microscopic molecular interactions between polymers and ILs. In this study, we performed small-angle neutron scattering (SANS) experiments on various PBnMA derivatives in deuterated IL solutions. The interaction parameter, ? between the polymers and the ILs was estimated from the obtained SANS profiles. Here, enthalpic (?H) and entropic (?S) contributions to ? were obtained from temperature dependence of ?. As a result, it was found that ?H strongly depends on the chemical structure of the polymers and the ILs. Furthermore, microscopic solvation structure of the polymers in IL systems was investigated by high-energy X-ray total scattering measurement with the aid of molecular dynamics (MD) simulations. It was found that there is strong correlation between the value of ?H and the microscopic solvation structure.en_AU
dc.identifier.citationHirosawa, K., Fujii, K., Ueki, T., Kitazawa, Y., Watanabe, M., Gilbert, E. P., & Shibayama, M. (2017). Microscopic solvation structure and phase behavior of thermo-responsive polymers in ionic liquids. Paper presented at ICNS 2017 (International Conference on Neutron Scattering), Daejeon, South Korea, 9 to 13 July 2017. Retrieved from: http://www.icns2017.org/program.phpen_AU
dc.identifier.conferenceenddate13 July 2017en_AU
dc.identifier.conferencenameICNS 2017 (International Conference on Neutron Scattering)en_AU
dc.identifier.conferenceplaceDaejeon, South Koreaen_AU
dc.identifier.conferencestartdate9 July 2017en_AU
dc.identifier.urihttp://www.icns2017.org/program.phpen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11288en_AU
dc.language.isoenen_AU
dc.publisherInternational Conference on Neutron Scatteringen_AU
dc.subjectMolten saltsen_AU
dc.subjectSolvent propertiesen_AU
dc.subjectElectric conductivityen_AU
dc.subjectPolymersen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectX-ray diffractionen_AU
dc.titleMicroscopic solvation structure and phase behavior of thermo-responsive polymers in ionic liquidsen_AU
dc.typeConference Abstracten_AU
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