Nonisothermal Crystallization Behavior of Poly(m-xylene adipamide)/Montmorillonite Nanocomposites

Magniez, K., Fox, B. L. and Looney, M. G. 2009, Nonisothermal Crystallization Behavior of Poly(m-xylene adipamide)/Montmorillonite Nanocomposites, Journal of polymer science. Part B, Polymer physics, vol. 47, no. 13, pp. 1300-1312.

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Title Nonisothermal Crystallization Behavior of Poly(m-xylene adipamide)/Montmorillonite Nanocomposites
Author(s) Magniez, K.
Fox, B. L.
Looney, M. G.
Journal name Journal of polymer science. Part B, Polymer physics
Volume number 47
Issue number 13
Start page 1300
End page 1312
Total pages 13
Publisher John Wiley & Sons, Inc
Place of publication Malden, Mass.
Publication date 2009-07-01
ISSN 0887-6266
1099-0488
Summary This article reports the nonisothermal crystallization behavior of MXD6 and its clay nanocomposite system (MXD6/MMT) using differential scanning calorimetry (DSC). The DSC experimental data were analyzed by theoretical modeling of the crystallization kinetics using the Avrami, Ozawa, Jeziorny, and the combined Avrami―Ozawa semiempirical models. It has been determined that these models adequately described the crystallization behavior of the MXD6 nanocomposite at cooling rates below 20 °C/min, but there was a deviation from linear dependence at higher cooling rates. This was attributed to changes of both the free energy and the cooling crystallization function K(T) over the entire crystallization process, as well as possible relaxation effects leading to structural rearrangements. In addition, the activation energy determined using the differential isoconversional method of Friedman was also found to vary, indicating changes in both the free energy and crystallization mechanism. Despite the lack of a reliable theoretical model, the heterogeneous nucleating activity of the MMT nanoparticles was demonstrated and quantified using Dobreva's method (Φ = 0.71), and the crystallization rate for the nanocomposite system was found to be greater than pure MXD6 by up to 79% at 40 °C/min.
Language eng
Field of Research 091209 Polymers and Plastics
Socio Economic Objective 860606 Plastics in Primary Forms
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2009, Wiley Periodicals, Inc.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30026300

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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