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Thermal stability and flammability properties of heterophasic PP–EP/EVA/organoclay nanocomposites by M. Valera-Zaragoza; E. Ramírez-Vargas; F.J. Medellín-Rodríguez; B.M. Huerta-Martínez is a Materials Science article available to read on EtoBox.

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A study on the thermal behavior and flammability properties of the heterophasic polypropylenee(ethyleneepropylene) copolymer (PPeEP)/ poly(ethylene vinyl acetate) (EVA)/montmorillonite nanocomposite is presented. Nanoclay nanocomposites were prepared using a twin screw extruder. Both the fluidity of the EVA phase and compatibility conditions between PPeEP and EVA were used in order to obtain the required nanocomposites. Therefore, no additional compatibilizer was required to achieve the clay dispersion. Products exhibited the partially exfoliated/ intercalated nanoclay dispersion. Thermogravimetric analyses indicated that nanoclays retard thermal degradation depending on nanoclay concentration. The retarding process was assigned to the exfoliation and dispersion of the silicate layers which impeded heat diffusion to the macromolecules. Thermal studies, under non-isothermal crystallization, indicated the lack of influence of nanoclay on the thermal behavior. Flammability characteristics were however affected by the nanoclay layers which overall generated flame retardation both in the EVA host and in the complex nanocomposites.

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Author

M. Valera-Zaragoza; E. Ramírez-Vargas; F.J. Medellín-Rodríguez; B.M. Huerta-Martínez

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0141-3910)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)