Use este identificador para citar ou linkar para este item: http://repositorio.ital.sp.gov.br/jspui/handle/123456789/672
Título: Effect of EVA as Compatibilizer on the Mechanical Properties, Permeability Characteristics, Lamellae Orientation, and Long Period of Blown Films of HDPE/Clay Nanocomposites
Autor(es): Marini, Juliano; et al.







Palavras-chave: Nanocomposites
Blown films
Compatibility
Mechanical properties
SAXS
Data do documento: 2010
Citação: Jounal of Applied Polymer Sciences, Hoboken, v.118, n. 6, p. 3340-3350, 2010. (Published online 14/07/2010 in Wiley InterScience, www.interscience.wiley.com)
Resumo: Two ethylene-vinyl acetate (EVA) resins with 19% (EVA19) and 28% (EVA28) of vinyl groups were used as compatibilizers for nanocomposites of high-density polyethylene (HDPE) and nanoclays. Two nanoclays were also used, one with a nonpolar surfactant (C15A) and another with a polar surfactant (C30B). The HDPE/ EVA19/C15A formed an intercalated structure, while the HDPE/EVA28/C30B had surfactant loss. Blown films of these compositions were produced. A two-phase morphology made of HDPE and EVA/nanoclay particles was observed, which was responsible for the increase in water vapor and oxygen permeability rates of the films. The elastic modulus E along the transverse direction of the films was higher than along the machine direction due to preserved orientation given by the spiral die; the lamellae orientation was measured by small-angle X-rays diffraction. The highest E was observed in the HDPE/EVA19/C15A film due to stronger interactions. The long period of the HDPE lamellas was not affected by the presence of the EVA and nanoclay. A model was proposed to explain the improvement in elastic modulus due to the processing conditions and components’ interactions.
URI: http://repositorio.ital.sp.gov.br/jspui/handle/123456789/672
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