Molecular dynamics of hyperbranched polyesters in the confinement of thin films.

@article{Serghei2005MolecularDO,
  title={Molecular dynamics of hyperbranched polyesters in the confinement of thin films.},
  author={A Serghei and Y Mikhailova and Heiko Huth and Ch Schick and K-J Eichhorn and Brigitte Voit and Friedrich Kremer},
  journal={The European physical journal. E, Soft matter},
  year={2005},
  volume={17 2},
  pages={199-202}
}
Broadband Dielectric Spectroscopy is employed to investigate the molecular dynamics in thin films of hyperbranched polyesters (type AB(1)B(2), with -OH and -OCOCH(3) as terminal groups). Three relaxation processes are detected: alpha, beta and gamma. While the latter two are not influenced by the confinement, a pronounced effect is observed on the alpha relaxation: with decreasing film thickness the slower relaxation modes of the dynamic glass transition are gradually suppressed, resulting in… CONTINUE READING

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