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Effect of LLDPE-g-MA on the rheological, thermal, mechanical properties and morphological characteristic of PA6/LLDPE blends

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Abstract

The development of polyamide 6 (PA6) and linear low-density polyethylene (LLDPE) blends is of great technological interest, as they have the potential to combine the good mechanical and thermal properties of PA6 with the high impact properties and good processability of the LLDPE. However, these two polymers are chemically and structurally different and therefore immiscible, and in general incompatible. The objective of this study was to evaluate the effect of maleic anhydride-grafted linear low-density polyethylene (LLDPE-g-MA) as compatibilizer agent on rheological, thermal, mechanical and morphological properties of PA6/LLDPE blends. PA6/LLDPE blends with different contents of LLDPE (10, 20, 30, 40 and 50 wt%) and with the addition of LLDPE-g-MA (5 wt%) were prepared in a twin screw extruder and the thermal and mechanical analysis were performed. The addition of LLDPE-g-MA as compatibilizer agent resulted in a better distribution and dispersion of LLDPE in PA6 matrix and a significant improvement in mechanical and thermal properties. The addition of the compatibilizer agent increased 160% the impact strength for the 50/50 (PA6/LLDPE) blend.

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Acknowledgements

The authors would like to thank the Brazilians Funding Institutions CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico – Process 405675/2018-6 and 310196/2018-3) and FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo - Process 2016/19978-9) for financial support. The authors also thank Master Polymers (Brazil) for the donating of PA6.

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Authors and Affiliations

  1. Department of Science and Technology, Polymer and Biopolymer Technology Laboratory (TecPBio), Federal University of São Paulo (UNIFESP), 330 Talim, São José dos Campos, SP, 12231-280, Brazil

    Erick Gabriel Ribeiro dos Anjos, Larissa Stieven Montagna & Fabio Roberto Passador

  2. Department of Materials Engineering, Federal University of São Carlos (UFSCar), Rodovia Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil

    Eduardo Henrique Backes, Juliano Marini & Luiz Antonio Pessan

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  1. Erick Gabriel Ribeiro dos Anjos
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Correspondence to Fabio Roberto Passador.

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dos Anjos, E.G.R., Backes, E.H., Marini, J. et al. Effect of LLDPE-g-MA on the rheological, thermal, mechanical properties and morphological characteristic of PA6/LLDPE blends. J Polym Res 26, 134 (2019). https://doi.org/10.1007/s10965-019-1800-y

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