Advertisement

Characterization of Polymer Systems by Real Time Pulsed NMR

  • T. Nishi
  • T. Hayashi
Conference paper
  • 100 Downloads

Abstract

Application of real time pulsed NMR(RTPNMR) for the characterization of polymer systems has been reviewed and several new examples are given. They include RTPNMR of curing process of epoxy resins and crosslinking process of polydiace-tylenes. In both cases, there appear several relaxation times for spin-spin relaxation time T2 and spin-lattice relaxation time in the rotating frame <Inline>1</Inline>. However, spin-lattice relaxation time T1 is single for epoxy resins and from these data, heterogeneous nature of the system during curing and cross-linking are analysed. For the last example, orientation of liquid crystalline polymers under magnetic field is detected by RTPNMR at high temperatures. RTPNMR is proved to be a powerful method for characterization of polymer systems in terms of degree of molecular motion.

Keywords

Polymer System Free Induction Decay Nematic Phase Interpenetrate Polymer Network Liquid Crystalline Polymer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    McBrierty VJ, Douglass DC (1981) J Polym Sci Macromol Rev 16: 295CrossRefGoogle Scholar
  2. 2.
    Tanaka H, Nishi T (1986) J Appl Phys 60:1306CrossRefGoogle Scholar
  3. 3.
    Tanaka H, Nishi T (1986) J Chem Phys 85:6197CrossRefGoogle Scholar
  4. 4.
    Tanaka H, Fukumori K, Nishi T (1988) J Chem Phys 89:3363CrossRefGoogle Scholar
  5. 5.
    Shioda R (1989) Master Thesis:Tokyo UnivGoogle Scholar
  6. 6.
    Hayashi T, Yamamura H, Nakamura N, Nishi T (1990) Rept Prog Polym Phys Jpn 33:495Google Scholar
  7. 7.
    Tanaka H, Nishi T (1986) Phys Rev B33:32CrossRefGoogle Scholar
  8. 8.
    Hayashi T, Nishi T (1991) Ann Rept Eng Res Inst Fac Eng Univ Tokyo 50:87Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • T. Nishi
    • 1
  • T. Hayashi
    • 1
  1. 1.Department of Applied Physics, Faculty of EngineeringThe University of TokyoBunkyo-ku, TokyoJapan

Personalised recommendations