Relaxation in poly-(ethylene terephthalate glycol)/montmorillonite nanocomposites studied by dielectric methods. Couderc, H., Delbreilh, L., Saiter, A., Grenet, J., Souza, N. D., & Saiter, J. M. Journal of Non-Crystalline Solids, 353(47–51):4334--4338, 2007.
Relaxation in poly-(ethylene terephthalate glycol)/montmorillonite nanocomposites studied by dielectric methods [link]Paper  doi  abstract   bibtex   
Samples of polyethylene-1,4-cyclohexylenedimethylene terephthalate glycol (PETG) with different filler contents were prepared by a master batch process. The dispersion state of montmorillonite was characterized using X-ray diffraction. The influence of nanofiller on molecular mobility at the glass transition was studied by dielectric relaxation spectroscopy and thermo stimulated depolarization currents. The use of these two techniques allowed us to determine the fragility index m. For this parameter, we observed a maximum for a 1 wt% montmorillonite content. For higher contents, no significant modification of the fragility index was observed. This behavior has been attributed to nanofiller agglomeration.
@article{ couderc_relaxation_2007,
  title = {Relaxation in poly-(ethylene terephthalate glycol)/montmorillonite nanocomposites studied by dielectric methods},
  volume = {353},
  issn = {0022-3093},
  url = {http://www.sciencedirect.com/science/article/pii/S0022309307008915},
  doi = {10.1016/j.jnoncrysol.2007.03.046},
  abstract = {Samples of polyethylene-1,4-cyclohexylenedimethylene terephthalate glycol (PETG) with different filler contents were prepared by a master batch process. The dispersion state of montmorillonite was characterized using X-ray diffraction. The influence of nanofiller on molecular mobility at the glass transition was studied by dielectric relaxation spectroscopy and thermo stimulated depolarization currents. The use of these two techniques allowed us to determine the fragility index m. For this parameter, we observed a maximum for a 1 wt% montmorillonite content. For higher contents, no significant modification of the fragility index was observed. This behavior has been attributed to nanofiller agglomeration.},
  number = {47–51},
  urldate = {2014-05-27TZ},
  journal = {Journal of Non-Crystalline Solids},
  author = {Couderc, H. and Delbreilh, L. and Saiter, A. and Grenet, J. and De Souza, N. and Saiter, J. M.},
  year = {2007},
  keywords = {Dielectric properties, relaxation, electric modulus, Enthalpy relaxation, Fragility, Glass transition, Nanocomposites, Polymers and organics, Structural relaxation, Thermally stimulated and depolarization current, X-ray diffraction},
  pages = {4334--4338}
}

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