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Morphology, mechanical and dynamic mechanical properties of recycled high density polyethylene and poly(vinyl alcohol) blends

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Summary

Blends of post-consumer high density polyethylene (HDPEr) and poly(vinyl alcohol) (PVA) were prepared with maleic anhydride-grafted HDPEr (HDPEr-AM), as the compatibilizer, to evaluate the effectiveness of the PVA as a modifier for polyethylene and influence of PVA concentration on the blend properties. Films of polyethylene having biodegradable polymers could be a good solution for agricultural purpose since they can degrade more easily. The blends HDPEr/HDPEr-AM/PVA were investigated by physical tests, dynamic-mechanical analysis (DMA) and scanning electron microscopy (SEM). Thermal properties were measured by means of differential scanning calorimetry (DSC). The blend HDPEr/HDPEr-AM/PVA (50/10/40) with 10wt% of compatibilizer showed the highest tensile strength (28 MPa) compared to the blends (60/40) without compatibilizer (11 MPa). On the other hand, morphologic analysis showed synergism of the polymers in the blend HDPEr/HDPEr-AM/PVA (30/10/60), with 10wt% of compatibilizer. Overall, it was observed that the blend HDPEr/HDPEr-AM/PVA with composition of (70/10/20) showed the best properties for agricultural films processing application.

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Authors and Affiliations

  1. Depto de Engenharia Química, Universidade de Caxias do Sul, Rua Francisco Getulio Vargas 1130, 95070-560, Caxias do Sul, RS, Brazil

    Rosmary N. Brandalise & Johnny D. N. Martins

  2. Depto de Física e Química, Universidade de Caxias do Sul, Rua Francisco Getulio Vargas 1130, 95070-560, Caxias do Sul, RS, Brazil

    Mara Zeni

  3. Escola de Engenharia, Universidade Federal do Rio Grande do Sul, CP 15010, 91501-970, Porto Alegre, RS, Brazil

    Maria M.C. Forte

Authors
  1. Rosmary N. Brandalise
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  2. Mara Zeni
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  3. Johnny D. N. Martins
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  4. Maria M.C. Forte
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Correspondence to Mara Zeni.

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Brandalise, R., Zeni, M., Martins, J. et al. Morphology, mechanical and dynamic mechanical properties of recycled high density polyethylene and poly(vinyl alcohol) blends. Polym. Bull. 62, 33–43 (2009). https://doi.org/10.1007/s00289-008-0989-4

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  • DOI: https://doi.org/10.1007/s00289-008-0989-4

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