Polímeros: Ciência e Tecnologia
Polímeros: Ciência e Tecnologia
Original Article

Rheological and thermal properties of EVA-organoclay systems using an environmentally friendly clay modifiera

Reinaldo Yoshio Morita; Juliana Regina Kloss; Ronilson Vasconcelos Barbosa; Bluma Guenther Soares; Luis Carlos Oliveira da Silva; Ana Lúcia Nazareth da Silva

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EVA systems, using an environmentally friendly organoclay modified with a non-ionic and free of ammonium ions modifier (BN-AM), were prepared in a single-screw laboratory extruder and characterized by rheological, morphological and thermal properties. WAXD analysis suggested that the nanocomposites with 1.5 wt% of BN-AM presented an exfoliated structure, while the rheological results showed that the nanocomposites with BN-AM organoclay tended to present a more pronounced shear thinning behavior when compared to EVA and the nanocomposites with the traditional organoclay. The SEM/EDS analysis by using elemental mappings showed good dispersion of the organoclays (BN-AM and BN-CT) in the EVA matrix. Thermogravimetry analysis showed an improvement in thermal stability of EVA when the non-ionic modifier was used instead of the traditional one. In general, it was concluded that the addition of low content of BN-AM organoclay in EVA matrices is a promising option for the production of nanocomposites.


EVA nanocomposite, organoclay, rheological property, thermal property, morphology


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