Influence of compatibility in the EVA/starch/organoclay biodegradable nanocomposite on thermal properties and flame self-extinguishing behavior

Thermal and flammability properties of ethylene vinyl acetate/starch/organoclay (EVA/S/C20A) nanocomposites are shown in this work. Wide-angle X-ray diffraction (WAXD) patterns and micrographs obtained by field emission scanning electron microscopy (FE-SEM) show the formation of nanostructured syste...

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Bibliographic Details
Published in:Polymer-plastics technology and engineering 2023-11, Vol.62 (17), p.2318-2333
Main Authors: García-Muñoz, Miguel A., Valera-Zaragoza, Mario, Aguirre-Cruz, Andrés, Carmona-García, Roselis, Ramírez-Hernández, Aurelio, Ramírez-Vargas, Eduardo, Sánchez-Valdes, Saúl
Format: Article
Language:English
Subjects:
Clay
Compatibility
Diffraction patterns
Ethylene vinyl acetates
Extinguishing
Field emission microscopy
Flammability
Nanocomposites
Photomicrographs
Thermal degradation
Thermodynamic properties
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Summary:Thermal and flammability properties of ethylene vinyl acetate/starch/organoclay (EVA/S/C20A) nanocomposites are shown in this work. Wide-angle X-ray diffraction (WAXD) patterns and micrographs obtained by field emission scanning electron microscopy (FE-SEM) show the formation of nanostructured systems. The organoclay layers were preferably intercalated-exfoliated with the EVA polymer. Even so, the vinyl acetate group in EVA interacted with both the C20A clay and the starch macromolecules, achieving compatibility between the three components. The intercalated layers of clay provided protection against thermal degradation of the EVA. However, based on the kinetic study, the Ea of the nanocomposite degradation was lower than that of pure EVA. The flammability tests demonstrated the absence of dripping during burning and the self-extinguishing capacity of the flame (HB in the UL-94 test) in the EVA/C20A and EVA/S/C20A nanocomposites. The results are related to the nanointercalation of the clay and the compatibility between the three components with different properties. Thus, the flame self-extinguishing potential of ternary nanocomposites, previously studied as biodegradable, is demonstrated.
ISSN:2574-0881
0360-2559
2574-089X
1525-6111
DOI:10.1080/25740881.2023.2258396