Relaxation in poly-(ethylene terephthalate glycol)/montmorillonite nanocomposites studied by dielectric methods

被引：25

作者：

Couderc, H.

Delbreilh, L.

Saiter, A.

Grenet, J.

De Souza, N.

Saiter, J. M.

机构：

[1] Univ Rouen, Fac Sci, CNRS, UMR 6522 LEquipe Caracterisat Amorphes & Polymer, F-76801 St Etienne, France

[2] Univ N Texas, Dept Mat Sci, Denton, TX 76203 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2007年 / 353卷 / 47-51期

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;

D O I：

10.1016/j.jnoncrysol.2007.03.046

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

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.

引用

页码：4334 / 4338

页数：5

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