Abstract
Polymer nanocomposites based on organo-modified Beidellite nanoclays (1–3 wt%) and poly(butylene succinate) (PBS) were elaborated and investigated using Scanning electron microscope (SEM), X-Ray diffraction (XRD), Differential Scanning Calorimetry (DSC) and Broadband Dielectric Spectroscopy (BDS). SEM analysis and XRD diffractograms demonstrated a good dispersion of added nanoclays in the poly(butylene succinate) matrix. A possible correlation between the crystallinity rate provided by the DSC results and the dielectric response of the samples was evaluated in order to establish a morphology-property relation. Additionally, a step-like variation related to an enthalpic relaxation within the rigid amorphous fraction (RAF) indicated a delayed contribution of this region to the overall dynamics of the polymer. The BDS results have shown various relaxation processes for which the activation energies were calculated after fitting the dielectric data by means of the Havriliak–Negami model. No significant effects of the added nanofiller on the glass transition temperature were observed. The extracted parameters confirm that a 2 wt% of Beidellite exhibits a better matrix/filler adhesion and hence improved interfacial properties. Thus, such filler load is recommended for a higher performing nanocomposite with potential applications.
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