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Polycation radius of gyration in a polymeric ionic liquid (PIL): the PIL melt is not a theta solvent.
Wong, Lucas N; Jones, Seamus D; Wood, Kathleen; de Campo, Liliana; Darwish, Tamim; Moir, Michael; Li, Hua; Segalman, Rachel A; Warr, Gregory G; Atkin, Rob.
Afiliación
  • Wong LN; School of Molecular Sciences, The University of Western Australia, Crawley, Perth 6009, Australia. rob.atkin@uwa.edu.au.
  • Jones SD; Chemical Engineering Department and Materials Department, University of California, Santa Barbara, California 93106, USA.
  • Wood K; Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights, NSW 2234, Australia.
  • de Campo L; Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights, NSW 2234, Australia.
  • Darwish T; National Deuteration Facility (NDF), ANSTO, Lucas Heights, NSW 2234, Australia.
  • Moir M; National Deuteration Facility (NDF), ANSTO, Lucas Heights, NSW 2234, Australia.
  • Li H; School of Molecular Sciences, The University of Western Australia, Crawley, Perth 6009, Australia. rob.atkin@uwa.edu.au.
  • Segalman RA; Chemical Engineering Department and Materials Department, University of California, Santa Barbara, California 93106, USA.
  • Warr GG; School of Chemistry and University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia.
  • Atkin R; School of Molecular Sciences, The University of Western Australia, Crawley, Perth 6009, Australia. rob.atkin@uwa.edu.au.
Phys Chem Chem Phys ; 24(7): 4526-4532, 2022 Feb 16.
Article en En | MEDLINE | ID: mdl-35119064
The conformation of the polycation in the prototypical polymeric ionic liquid (PIL) poly(3-methyl-1-aminopropylimidazolylacrylamide) bis(trifluoromethylsulfonyl)imide (poly(3MAPIm)TFSI) was probed using small-angle neutron scattering (SANS) and ultra-small-angle neutron scattering (USANS) at 25 °C and 80 °C. Poly(3MAPIm)TFSI contains microvoids which lead to intense low q scattering that can be mitigated using mixtures of hydrogen- and deuterium-rich materials, allowing determination of the polycation conformation and radius of gyration (Rg). In the pure PIL, the polycation adopts a random coil conformation with Rg = 52 ± 0.5 Å. In contrast to conventional polymer melts, the pure PIL is not a theta solvent for the polycation. The TFSI- anions, which comprise 48% v/v of the PIL, are strongly attracted to the polycation and act like small solvent molecules which leads to chain swelling analogous to an entangled, semi-dilute, or concentrated polymer solution in a good solvent.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Asunto de la revista: BIOFISICA / QUIMICA Año: 2022 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Asunto de la revista: BIOFISICA / QUIMICA Año: 2022 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido