{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Aoki K"],"funding":["Iketani Science and Technology Foundation","Tokai Foundation for Technology","Asahi Glass Foundation","Foundation of Kinoshita Memorial Enterprise"],"pagination":["10396-10401"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10683071"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["14(46)"],"pubmed_abstract":["Sol-gel transitions of polymers are pivotal phenomena in material science, yet the critical phenomenon of structure during gelation has remained unclear. Here, we investigated the sol-gel transition of a fluorous polymer, poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene), in a blend of two ionic liquids. This system features a quite high amount of cross-linker and binding sites with ion-dipole interactions between the cation and C-F dipoles, thereby facilitating easy exchange of the cross-links. Changing the mixing ratio of the two ionic liquids enabled tuning the ion-dipole interactions and inducing sol-gel transition. Notably, the correlation length and molar mass, obtained by small-angle X-ray scattering, diverged at the gelation point. Moreover, the derived critical exponents (ν = 0.85 ± 0.05) aligns remarkably well with the prediction from percolation theory (ν = 0.88). To our knowledge, this is the first report on the evident divergence during polymeric gelation by small-angle scattering and the verification of the critical exponents of the percolation theory."],"journal":["The journal of physical chemistry letters"],"pubmed_title":["Polymeric Sol-Gel Transition with the Diverging Correlation Length Verified by Small-Angle X-ray Scattering."],"pmcid":["PMC10683071"],"funding_grant_id":["0341186-A"],"pubmed_authors":["Takahashi R","Aoki K","Sugawara-Narutaki A"],"additional_accession":[]},"is_claimable":false,"name":"Polymeric Sol-Gel Transition with the Diverging Correlation Length Verified by Small-Angle X-ray Scattering.","description":"Sol-gel transitions of polymers are pivotal phenomena in material science, yet the critical phenomenon of structure during gelation has remained unclear. Here, we investigated the sol-gel transition of a fluorous polymer, poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene), in a blend of two ionic liquids. This system features a quite high amount of cross-linker and binding sites with ion-dipole interactions between the cation and C-F dipoles, thereby facilitating easy exchange of the cross-links. Changing the mixing ratio of the two ionic liquids enabled tuning the ion-dipole interactions and inducing sol-gel transition. Notably, the correlation length and molar mass, obtained by small-angle X-ray scattering, diverged at the gelation point. Moreover, the derived critical exponents (ν = 0.85 ± 0.05) aligns remarkably well with the prediction from percolation theory (ν = 0.88). To our knowledge, this is the first report on the evident divergence during polymeric gelation by small-angle scattering and the verification of the critical exponents of the percolation theory.","dates":{"release":"2023-01-01T00:00:00Z","publication":"2023 Nov","modification":"2025-04-18T13:12:46.491Z","creation":"2025-04-06T22:45:27.72Z"},"accession":"S-EPMC10683071","cross_references":{"pubmed":["37955630"],"doi":["10.1021/acs.jpclett.3c02631"]}}