EVA-g-MAH和滑石粉对金属氢氧化物/LLDPE材料性能的影响

何风, 邹修敏, 周松, 徐淳, 屈超, 黄坤, 甘巧

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塑料科技 ›› 2024, Vol. 52 ›› Issue (06) : 35-40. DOI: 10.15925/j.cnki.issn1005-3360.2024.06.007
理论与研究

EVA-g-MAH和滑石粉对金属氢氧化物/LLDPE材料性能的影响

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

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摘要

为提高金属氢氧化物/聚乙烯复合材料的韧性和阻燃性能，以滑石粉（Talc）为阻燃协效剂，马来酸酐接枝乙烯-醋酸乙烯酯共聚物（EVA-g-MAH）为增韧剂，通过双螺杆挤出机和注塑成型制备了氢氧化铝/氢氧化镁/线型低密度聚乙烯（ATH/MH/LLDPE）阻燃复合材料。通过拉伸、冲击、极限氧指数、垂直燃烧试验和扫描电镜研究了ATH/MH、EVA-g-MAH和Talc含量对阻燃LLDPE力学性能、阻燃性能和形貌的影响。结果表明：ATH/MH含量增加，ATH/MH/EVA-g-MAH/LLDPE的拉伸强度和阻燃性能增加，断裂伸长率和冲击强度明显降低。添加EVA-g-MAH有利于树脂基体包覆和分散ATH/MH，可同时提高ATH/MH/LLDPE的韧性和阻燃性能。固定阻燃剂（ATH、MH、Talc）总含量为60%，3%~11% Talc部分替代ATH/MH使复合材料的极限氧指数提高1.4%~4.2%，Talc和ATH/MH具有协同阻燃效应，7% Talc部分替代ATH/MH使Talc/ATH/MH/EVA-g-MAH/LLDPE的断裂伸长率和冲击强度分别提高50.0%和13.4%。

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.

关键词

线型低密度聚乙烯 / 金属氢氧化物 / 马来酸酐接枝乙烯-醋酸乙烯酯共聚物 / 滑石粉 / 协同阻燃 / 力学性能

Key words

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

中图分类号

TQ325.1

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导出引用
何风 , 邹修敏 , 周松 , 等. EVA-g-MAH和滑石粉对金属氢氧化物/LLDPE材料性能的影响. 塑料科技. 2024, 52(06): 35-40 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.06.007
HE Feng, ZOU Xiu-min, ZHOU Song, et al. EVA-g-MAH and Talc on Performance of Metal Hydroxide/LLDPE Composites[J]. 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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基金

四川省科技厅项目(2023YFG0241)
精细化工应用技术泸州市重点实验室项目(HYJH-2308-B)

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