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Progress in Pacific Polymer Science 2 pp 113–129Cite as

Interdomain Communicaton via Magnetic Spin Diffusion in a Microphase-Separated Polyurethane Elastomer

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Abstract

High-resolution carbon-13 solid state NMR spectroscopy is employed to monitor communication between the rigid and mobile domains in a polyether-polyurethane elastomer via proton magnetization transport. Results from thermal analysis and polarized optical microscopy indicate that the urethane-rich hard domains are semicrystalline and exhibit spherulitic growth that is somewhat disordered. Proton magnetization gradients are established via mobility differences between the two domains, and the ensuing spin-diffusion process is monitored via the carbon-13 nuclear manifold. Chemical structural differences between the two types of segments produce high-resolution 13C NMR signals that allow one to track interdomain communication. Magnetic spin-temperature equilibration between the two domains occurs on the 10–100 ms time scale. This is consistent with a finely dispersed array of hard and soft microphases. The polyurethane proton-spin-diffusion results are similar to those obtained for a variety of SURLYN™ and KRATON™ commercial phase-separated copolymers.

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Author information

Authors and Affiliations

  1. Department of Chemical Engineering Polymer Physics and Engineering Laboratory, Colorado State University, Fort Collins, Colorado, USA, 80523

    Laurence A. Belfiore

Authors
  1. Laurence A. Belfiore
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Editor information

Editors and Affiliations

  1. Department of Polymer Chemistry, Kyoto University, Kyoto, 606, Japan

    Y. Imanishi

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© 1992 Springer-Verlag Berlin Heidelberg

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Belfiore, L.A. (1992). Interdomain Communicaton via Magnetic Spin Diffusion in a Microphase-Separated Polyurethane Elastomer. In: Imanishi, Y. (eds) Progress in Pacific Polymer Science 2. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77636-6_11

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  • DOI: https://doi.org/10.1007/978-3-642-77636-6_11

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-77638-0

  • Online ISBN: 978-3-642-77636-6

  • eBook Packages: Springer Book Archive

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