
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
EVA-g-MAH和滑石粉对金属氢氧化物/LLDPE材料性能的影响
EVA-g-MAH and Talc on Performance of Metal Hydroxide/LLDPE Composites
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%。
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.
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
Linear low density polyethylene / Metal hydroxide / EVA-g-MAH / Talc / Synergistic flame retardant / Mechanical properties
TQ325.1
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2 |
曾书航,裴丰,郭忠,等.氢氧化镁阻燃剂的制备及其在塑料领域中的应用研究进展[J].塑料科技,2023,51(6):107-111.
|
3 |
|
4 |
|
5 |
李学锋,陈绪煌,周密.氢氧化铝阻燃剂在高分子材料中的应用[J].中国塑料,1999,13(6):80-85.
|
6 |
侯欣鹏,矫阳,李铁军,等.Mg(OH)2/Al(OH)3阻燃电缆护套料性能的研究[J].中国塑料,2012,26(10):96-100.
|
7 |
任政,王旭.氢氧化铝/氢氧化镁协同阻燃低烟无卤聚烯烃电缆料的研究[J].塑料助剂,2018(4):36-40.
|
8 |
吴伟明,高岩,张燕芬,等.氢氧化铝在聚乙烯中阻燃性能的研究[J].塑料工业,2008,36(6):210-212.
|
9 |
王正洲,瞿保钧,范维澄,等.表面处理剂在氢氧化镁阻燃聚乙烯体系中的应用[J].功能高分子学报,2001,14(1):45-48.
|
10 |
孙志丹,张志斌,陈晓浪.EVA用无卤阻燃剂的研究进展[J].塑料科技,2012,40(6):82-85.
|
11 |
|
12 |
甄建斌,伊佳佳,姬占有,等.EPDM/EVA共混发泡胶料的制备和性能研究[J].橡胶工业,2022,69(11):812-821.
|
13 |
陈元芳,宫敬禹,韩超,等.EVA改性PP/杨木粉复合材料的制备及性能研究[J].材料导报,2010,24(8):104-107.
|
14 |
|
15 |
李建新,吴洁.复配阻燃聚乙烯体系的研究[J].绝缘材料,2011,44(3):26-29.
|
16 |
李晓林,裴志强,张立群.EVA对HDPE/EVA/CB导电复合材料性能的影响[J].塑料,2007,36(2):5-8.
|
17 |
|
18 |
|
19 |
|
20 |
|
21 |
|
22 |
应杰,邱琪浩,章兴,等.滑石粉对阻燃聚碳酸酯性能的影响[J].中国塑料,2021,35(5):107-112.
|
23 |
|
24 |
|
25 |
|
26 |
|
27 |
|
/
〈 |
|
〉 |