EVA-g-MAH and Talc on Performance of Metal Hydroxide/LLDPE Composites

HE Feng, ZOU Xiu-min, ZHOU Song, XU Chun, QU Chao, HUANG Kun, GAN Qiao

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (06) : 35-40. DOI: 10.15925/j.cnki.issn1005-3360.2024.06.007
Theory and Research

EVA-g-MAH and Talc on Performance of Metal Hydroxide/LLDPE Composites

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Abstract

To improve the toughness and flame retardancy of metal hydroxide/polyethylene composites, talc (Talc) was used as a flame retardant synergist, maleic anhydride grafted ethylene-vinyl acetate copolymer (EVA-g-MAH) was used as a toughener, and the aluminum hydroxide/magnesium hydroxide/linear low density polyethylene (ATH/MH/LLDPE) flame-retardant composites were prepared by twin-screw extruder and injection molding. The effects of ATH/MH, EVA-g-MAH, and Talc content on the mechanical properties, flame retardancy, and morphology of flame-retardant LLDPE were studied by tensile test, impact test, limiting oxygen index test, vertical burning test, and scanning electron microscope. The results show that as the content of ATH/MH increases, the tensile strength and flame retardancy of ATH/MH/EVA-g-MAH/LLDPE increase, while the elongation at break and impact strength decrease significantly. The addition of EVA-g-MAH is beneficial to the resin matrix wrapping and dispersing of ATH/MH, which can improve the toughness and flame retardancy of ATH/MH/LLDPE simultaneously. When the total content of flame retardants (ATH, MH, Talc) is fixed at 60%, replacing 3%~11% of ATH/MH with Talc can increase the limiting oxygen index by 1.4%~4.2%, and Talc and ATH/MH have a synergistic flame-retardant effect. Replacing 7% of ATH/MH with Talc can increase the elongation at break and impact strength of Talc/ATH/MH/EVA-g-MAH/LLDPE by 50.0% and 13.4%, respectively.

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Linear low density polyethylene / Metal hydroxide / EVA-g-MAH / Talc / Synergistic flame retardant / Mechanical properties

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HE Feng , ZOU Xiu-min , ZHOU Song , et al . EVA-g-MAH and Talc on Performance of Metal Hydroxide/LLDPE Composites. Plastics Science and Technology. 2024, 52(06): 35-40 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.06.007

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