Solid-State NMR Investigations of the Unusual Effects Resulting from the Nanoconfinement of Water within Amphiphilic Crosslinked Polymer Networks Academic Article uri icon

abstract

  • Two types of solid-state 19F NMR spectroscopy experiments are used to characterize phase-separated hyperbranched fluoropolymer-poly(ethylene glycol) (HBFP-PEC) crosslinked networks. Mobile (soft) domains are detected in the HBFP phase by a rotor-synchronized Hahn echo under magicangle spinning conditions, and rigid (hard) domains by a solid echo with no magic-angle spinning. The mobility of chains is detected in the PEC phase by 1H 13C cross-polarization transfers with 1H spin-lock filters with and without magic-angle spinning. The interface between HBFP and PEG phases is detected by a third experiment, which utilized a 19F 1H-(Spin diffusion)-1H 13C double transfer with 13C solid-echo detection. The results of these experiments show that composition-dependent PEG inclusions in the HBFP glass rigidity on hydration, consistent with an increase in macroscopic tensile strength. 2009 WILEY-VCH Verlag GmbH & Co. KGaA.

published proceedings

  • ADVANCED FUNCTIONAL MATERIALS

author list (cited authors)

  • Ohashi, R., Bartels, J. W., Xu, J., Wooley, K. L., & Schaefer, J.

citation count

  • 6

complete list of authors

  • Ohashi, Ryutaro||Bartels, Jeremy W||Xu, Jinqi||Wooley, Karen L||Schaefer, Jacob

publication date

  • November 2009

publisher