Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Variable Temperature High-Resolution 19F MAS Solid-State NMR Characterization of Fluorocarbon Rubbers

  • Park, Tae-Joon (Department of Chemistry and Protein Research Center for Bio-Industry, Hankuk University of Foreign Studies) ;
  • Choi, Sung-Sub (Department of Chemistry and Protein Research Center for Bio-Industry, Hankuk University of Foreign Studies) ;
  • Kim, Ji-Sun (Department of Chemistry and Protein Research Center for Bio-Industry, Hankuk University of Foreign Studies) ;
  • Kim, Yong-Ae (Department of Chemistry and Protein Research Center for Bio-Industry, Hankuk University of Foreign Studies)
  • Received : 2011.04.18
  • Accepted : 2011.05.29
  • Published : 2011.07.20
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Abstract

Variable temperature high-resolution $^{19}F$ magic angle spinning (MAS) solid-state NMR spectroscopy was used to characterize fluorocarbon (FKM) rubbers. The high-resolution spectra of copolymers made from two monomers, vinylidene fluoride and hexafluoropropene, and terpolymers composed of vinylidene fluoride, hexafluoropropene, and tetrafluoroethylene, were obtained using MAS speeds of up to 18 kHz combined with high temperatures of up to 200 $^{\circ}C$ at a magnetic field strength of 9.4 Tesla. From these high resolution solid-state NMR spectra, we were able to assign the spectral peaks and differentiate the copolymer FKM from the terpolymer FKM. We also determined quantitatively the monomer compositions of each FKM rubber.

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