Polymer Studies

  • Martin M. Dorio

Abstract

The physical and mechanical properties of solid polymers are dependent on the molecular motions as well as the inter- and intramolecular interactions. Several methods have been useful in the study of these motions: dielectric relaxation, dynamic mechanical relaxation(1) and nuclear magnetic resonance.(2) Epr has also been used, of course, to probe molecular motions. The method has seen applications in both biological systems(3) and in polymers.(4–7) The latter were for polymeric systems in solution or for solid polymers in the vicinity of their melting transitions. This has been due primarily to the limited sensitivity of the epr method in the slow-motion region. At these low temperatures, line-shape changes become small and subtle, thereby reducing the amount of information extractable from the spectra. Nevertheless, epr studies in the solid state region [i.e., correlation times (τ c ) less than 10−7 sec] have been carried out(8–11) on a few systems.

Keywords

Polystyrene Polypropylene Macromolecule Fluorine PMMA 

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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • Martin M. Dorio
    • 1
  1. 1.Diamond Shamrock CorporationT. R. Evans Research CenterPainesvilleUSA

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