期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 353, 期 47-51, 页码 4334-4338出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2007.03.046
关键词
X-ray diffraction; dielectric properties; relaxation; electric modulus; thermally stimulated and depolarization current; glass transition; nanocomposites; polymers and organics; enthalpy relaxation; fragility; structural relaxation
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. (c) 2007 Elsevier B.V. All rights reserved.
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