PRODUCTION OF PLA/EE-g-GMA NANOCOMPOSITES REINFORCED WITH CARBON NANOTUBES FOR ANTISTATIC APPLICATION
PRODUCTION OF PLA/EE-g-GMA NANOCOMPOSITES REINFORCED WITH CARBON NANOTUBES FOR ANTISTATIC APPLICATION
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DOI: https://doi.org/10.22533/at.ed.2012407033
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Palavras-chave: Poli(ácido lático), modificador de impacto, nanotubos de carbono, nanocompósitos, antiestática
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Keywords: Poly(lactic acid), impact modifier, carbon nanotubes, nanocomposites, antistatic
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Abstract: Poly(lactic acid) (PLA)/elastomeric ethylene grafted with glycidyl methacrylate (EE-g-GMA) nanocomposites were prepared, using carbon nanotubes (MWCNT) with conductive nanofiller. The PLA/EE-g-GMA/MWCNT nanocomposites were processed in a twin-screw extruder and injection molded. The properties of impact strength, tensile strength, electrical conductivity (σ), and morphology were determined. The impact strength of the PLA/EE-g-GMA blend increased by 442.5% compared to pure PLA, suggesting toughening occurred. Incorporating MWCNT into PLA/EE-g-GMA promoted a reduction in impact strength in the PLA/EE-g-GMA base- system; however, the nanocomposites are more tough than pure PLA. As the MWCNT content increased in the PLA/EE-g-GMA/MWCNT nanocomposites, the elastic modulus increased, and the tensile strength reduced, compared to PLA/EE-g-GMA. Scanning electron microscopy (SEM) indicated a good interaction between PLA and EE-g-GMA, forming well-adhered and refined particles, justifying the high performance under impact of the PLA/EE-g-GMA blend. In contrast, MWCNT negatively affected the morphology of the nanocomposites, generating many voids with increasing MWCNT content. The PLA/EE-g-GMA/MWCNT (5 phr - part per hundred resin) nanocomposite has technological potential, considering it increased impact strength by 63.8% concerning pure PLA. In addition, it presented an electrical conductivity of 3.91 x 10-06 S.cm-1, an adequate value for possible antistatic application
- Carlos Bruno Barreto Luna
- Renate Maria Ramos Wellen
- Edcleide Maria Araújo