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Effect of EVA copolymer containing different VA content on the thermal and rheological properties of bio-based high-density polyethylene/ethylene vinyl acetate blends

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Abstract

The effect of ethylene vinyl acetate (EVA) concentration and vinyl acetate (VA) content of EVA on the mechanical, morphological, and rheological properties of bio-based high-density polyethylene (BioPE)/EVA blends was investigated. The blends were characterized by X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, and rheological measurements under oscillatory shear flow. The degree of crystallinity of BioPE decreased with the increase in the EVA concentration and was unaffected with the increase in the VA content. DMTA results showed a decrease in the storage modulus (E′) with the increase in EVA content and that the BioPE/EVA19 blends showed higher E′ values than BioPE/EVA28 blend. The impact strength substantially increased with the addition of EVA concentration above 5 mass% and was higher for the blends containing the highest VA content. The blends containing a higher content of VA exhibited the higher EVA dispersed phase domain size, which increased with the increase in EVA concentration. The complex viscosity increased with the increase in the EVA content, being higher for the BioPE/EVA blends containing higher VA content. The storage modulus increased, at low frequencies, with the increase in the EVA content and can be ascribed to the increase in the EVA dispersed phase domain size.

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Acknowledgements

The authors thank CAPES and CNPq for financial support.

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Authors and Affiliations

  1. Departamento de Engenharia de Materiais, Universidade Federal de Campina Grande, R. Aprígio Veloso, 882, Universitário, Campina Grande, PB, 58429-900, Brazil

    Giselly M. G. Farias, Pankaj Agrawal, Ruth B. L. Hanken, Jeane P. de Araújo, Akidauana D. B. de Oliveira & Tomás J. A. de Mélo

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  1. Giselly M. G. Farias
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  2. Pankaj Agrawal
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  3. Ruth B. L. Hanken
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  4. Jeane P. de Araújo
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  5. Akidauana D. B. de Oliveira
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  6. Tomás J. A. de Mélo
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Correspondence to Tomás J. A. de Mélo.

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Farias, G.M.G., Agrawal, P., Hanken, R.B.L. et al. Effect of EVA copolymer containing different VA content on the thermal and rheological properties of bio-based high-density polyethylene/ethylene vinyl acetate blends. J Therm Anal Calorim 146, 2127–2139 (2021). https://doi.org/10.1007/s10973-020-10423-5

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  • DOI: https://doi.org/10.1007/s10973-020-10423-5

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