Polymer Bulletin

, Volume 58, Issue 1, pp 65–74 | Cite as

Poly(imide-amide)-poly(ethylene glycol) hybrid networks: nanostructure, molecular dynamics and membrane properties

  • Vladimir A. Bershtein
  • Larisa M. Egorova
  • Pavel N. Yakushev
  • Vladimir Sindelar
  • Petr Sysel
  • Tatiana E. Sukhanova
  • Irina P. Dobrovolskaya
  • Anatoly I. Grigoriev
  • Sotiria Kripotou
  • Polycarpos Pissis
Article

Summary

Nanometer-scale structure, molecular dynamics (at 100-580 K) and membrane properties were studied in two series of poly(imide-amide) (PIA)-poly(ethylene glycol) (PEG) hybrid networks with regularly varied composition and different lengths of PEG crosslinks (Mn= 1000 or 3400). Combined WAXD/SAXS/polarized microscopy/DSC/DRS/TSDC/creep rate spectroscopy (CRS) analysis of these hybrids was performed. Depending on their composition, semicrystalline or mesomorphous, or amorphous state, and nanostructural heterogeneity were observed for these networks. They could be subdivided into (a) the PIA-rich hybrids with spatially isolated PEG domains, “suppressed” dynamics in the PEG glass transition, and PIA domains with Tg=520–570 K (group 1), and (b) the other hybrids with a continuous PEG phase and low-temperature glass transition only (group 2). Heterogeneity in segmental dynamics was revealed by CRS over the temperature range from TgPEG to TgPIA. In the second group of hybrids, the permeability coefficients were higher, by two or three orders of magnitude, for organic vapors than those for air gases.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Vladimir A. Bershtein
    • 1
  • Larisa M. Egorova
    • 1
  • Pavel N. Yakushev
    • 1
  • Vladimir Sindelar
    • 2
  • Petr Sysel
    • 2
  • Tatiana E. Sukhanova
    • 3
  • Irina P. Dobrovolskaya
    • 3
  • Anatoly I. Grigoriev
    • 3
  • Sotiria Kripotou
    • 4
  • Polycarpos Pissis
    • 4
  1. 1.Materials Dynamics LaboratoryIoffe Physico-Technical Institute of Russian Academy of SciencesSt. PetersburgRussia
  2. 2.Department of PolymersInstitute of Chemical TechnologyPrague 6Czech Republic
  3. 3.Polymer Morphology LaboratoryInstitute of Macromolecular Compounds of Russian Academy of SciencesSt. PetersburgRussia
  4. 4.Department of PhysicsNational Technical University of AthensAthensGreece

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