Thermo-XRD and differential scanning calorimetry to trace epitaxial crystallization in PA6/montmorillonite nanocomposites |
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| Authors: | Africa Yebra-Rodríguez Pedro Alvarez-Lloret Alejandro B Rodríguez-Navarro Jose Daniel Martín-Ramos Carolina Cardell |
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| Affiliation: | 1. Department of Geology, Faculty of Experimental Science, University of Jaén, Campus Las Lagunillas s/n, 23071 Jaén, Spain;2. Department of Mineralogy and Petrology, Faculty of Science, University of Granada, Campus Fuentenueva s/n, 18071 Granada, Spain;1. Research Center of Nanoscience and Nanotechnology, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China;2. College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China |
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| Abstract: | The physical properties of montmorillonite–polyamide nanocomposites, which in turn determine varied industrial applications are greatly dependent on polymer crystal structure and crystallinity. Thus, control of polyamide crystallization is critical, especially when this polymer adopts different polymorphic structures. To fully characterize the crystallization behavior of this nanocomposite by increasing temperature, this work presents for the first time an innovative approach based on combined new thermo-X-ray diffraction (TXRD) routines for 2D mapping and differential scanning calorimetry (DSC) techniques. Results reveal that: (i) organically modified montmorillonite included in the polymer matrix, composed of polyamide-6, increases the thermal stability of the nanocomposite, and (ii) epitaxial mechanisms explain the nucleation of the thermodynamically less stable γ crystal phase reported in the literature. |
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