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Conformational rigidity and dielectric properties of polyimides

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Abstract

On the basis of two series of polyimides it was shown that the conformational rigidity and the presence of side voluminous substituents determine the packing of macromolecular chains in glassy state. The presence of hexafluoroisopropylidene groups leads to the increase of free volume of polymers due to the repulsion of such groups belonging to different macromolecular chains. The physical properties studied here, such as dielectric permittivity and electrets properties depend on the size of free volume. The normalized surface potential is determined by the mass fraction of fluorine content and by the conformational rigidity of those polymers.

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Authors and Affiliations

  1. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov st. 28, Moscow, Russia, 119991

    Inga A. Ronova

  2. “Petru Poni” Institute of Macromolecular Chemistry, Romanian Academy, Aleea Grigore Ghica Voda 41A, Iasi, 700487, Romania

    Maria Bruma

  3. Macromolecular Chemistry I and Bayreuther Institute for Macromolecular Research, University of Bayreuth, 95440, Bayreuth, Germany

    Hans-Werner Schmidt

Authors
  1. Inga A. Ronova
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  2. Maria Bruma
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  3. Hans-Werner Schmidt
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Correspondence to Maria Bruma.

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Ronova, I.A., Bruma, M. & Schmidt, HW. Conformational rigidity and dielectric properties of polyimides. Struct Chem 23, 219–226 (2012). https://doi.org/10.1007/s11224-011-9865-1

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  • DOI: https://doi.org/10.1007/s11224-011-9865-1

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