EVA-g-MAH对导电炭黑/PA66复合材料性能和形貌的影响

魏菊, 马正禄, 黄坤, 甘巧

PDF(1114 KB)
PDF(1114 KB)
塑料科技 ›› 2024, Vol. 52 ›› Issue (07) : 38-42. DOI: 10.15925/j.cnki.issn1005-3360.2024.07.008
理论与研究

EVA-g-MAH对导电炭黑/PA66复合材料性能和形貌的影响

作者信息 +

Effect of EVA-g-MAH on the Properties and Morphologies of Conductive Carbon Black/PA66 Composites

Author information +
History +

摘要

采用马来酸酐接枝乙烯-醋酸乙烯酯共聚物(EVA-g-MAH)改性,用双螺杆挤出和注塑成型制备增韧的导电炭黑/尼龙66(CCB/PA66)抗静电复合材料,测试材料力学、熔体流动和抗静电性能,使用扫描电子显微镜(SEM)观察断面相貌,采用差示扫描量热法(DSC)研究结晶行为。结果表明:EVA-g-MAH和PA66相容性良好。CCB能够提高PA66的抗静电性能,但使韧性和熔体流动性能降低。EVA-g-MAH可改善8% CCB/PA66的韧性和熔体加工性能。在8% CCB/PA66共混物中添加10% EVA-g-MAH,使冲击强度和断裂伸长率分别提高75.4%和45.1%,同时8% CCB/EVA-g-MAH/PA66保持较高的拉伸强度(50.5 MPa)。EVA-g-MAH质量分数为20%时,CCB选择性分布使8% CCB/PA66的体积电阻率和表面电阻降低2~3个数量级,分别达到4.3×107 Ω∙cm和6.5×106 Ω。EVA-g-MAH质量分数为10%时,能够促进8% CCB/EVA-g-MAH/PA66中PA66的结晶;EVA-g-MAH质量分数为20%时,会抑制8% CCB/EVA-g-MAH/PA6中PA66的结晶。

Abstract

Tough conductive carbon black/nylon66 (CCB/PA66) antistatic composites modified by maleic anhydride-grafted ethylene-vinyl acetate copolymer (EVA-g-MAH) were prepared by twin-screw extrusion and injection molding. The mechanical, melt flow, and antistatic properties of the composites were tested, and the fracture surface morphologies and crystallization behavior of the composites were observed and studied by scanning electron microscopy (SEM) and differential scanning calorimetry (DSC), respectively. The results showed that EVA-g-MAH has good compatibility with PA66. The antistatic properties of PA66 increased with the addition of CCB, however the toughness and processing ability of the composites decreased significantly. The addition of 10% EVA-g-MAH in the 8% CCB/PA66 blend resulted in a 75.4% and 45.1% increase in impact strength and elongation at break, respectively, while maintaining relatively higher tensile strength (50.5 MPa). When the mass fraction of EVA-g-MAH was 20%, the volume resistivity and surface resistance and of 8% CCB/PA66 decreased by 2 to 3 orders of magnitude to 4.3×107 Ω∙cm and 6.5×106 Ω, respectively, due to the selective location of CCB particles in 8% CCB/EVA-g-MAH/PA66. 10% EVA-g-MAH enhanced the crystal formation of PA66 in the 8% CCB/EVA-g-MAH/PA6 composites, however 20% EVA-g-MAH inhibited the crystal formation of PA66.

关键词

尼龙66 / 导电炭黑 / 马来酸酐接枝乙烯-醋酸乙烯酯共聚物 / 力学性能 / 抗静电性能

Key words

Nylon 66 / Conductive carbon black / Maleic anhydride grafted ethylene-vinyl acetate copolymer / Mechanical properties / Antistatic property

中图分类号

TQ323.6 / TB332

引用本文

导出引用
魏菊 , 马正禄 , 黄坤 , . EVA-g-MAH对导电炭黑/PA66复合材料性能和形貌的影响. 塑料科技. 2024, 52(07): 38-42 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.07.008
WEI Ju, MA Zheng-lu, HUANG Kun, et al. Effect of EVA-g-MAH on the Properties and Morphologies of Conductive Carbon Black/PA66 Composites[J]. Plastics Science and Technology. 2024, 52(07): 38-42 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.07.008

参考文献

1
杨涛,徐东东,张强,等.抗静电阻燃增强PA6材料的漏电起痕性能研究[J].塑料工业,2013,41(2):115-118.
2
HU J, ZHANG H B, HONG S, et al. Simultaneous improvement in both electrical conductivity and toughness of polyamide 6 nanocomposites filled with elastomer and carbon black particles[J]. Industrial and Engineering Chemistry Research, 2014, 53(6): 2270-2276.
3
陶炜,高志秋,金文兰.阻燃抗静电增强尼龙风机叶片的开发与应用[J].工程塑料应用,2001,29(1):26-28.
4
YAN D, ZHANG H B, JIA Y, et al. Improved electrical conductivity of polyamide 12/graphene nanocomposites with maleated polyethylene-octene rubber prepared by melt compounding[J]. ACS Applied Materials and Interfaces, 2012, 4(9): 4740-4745.
5
刘罡.抗静电PA6复合材料的性能研究[J].塑料工业,2011,39(9):52-56.
6
IMANOL G, JOSE I E, JON N. Attaining high electrical conductivity and toughness in PA6 by combined addition of MWCNT and rubber[J].Composites Part A: Applied Science and Manufacturing, 2012, 43(9): 1482-1489.
7
BEATE K, CECILE S, REGINE B, et al. Localization of carbon nanotubes in polyamide 6 blends with non-reactive and reactive rubber[J]. Polymer, 2014.55(13): 3062-3067.
8
CHEN J, DU X C, ZHANG W B, et al. Synergistic effect of carbon nanotubes and carbon black on electrical conductivity of PA6/ABS blend[J]. Composites Science and Technology, 2013, 81(14): 1-8.
9
CHENG H K F, SAHOO N G, PAN Y Z, et al. Complementary effects of multiwalled carbon nanotubes and conductive carbon black on polyamide 6[J]. Journal of Polymer Science: Part B: Polymer Physics, 2010, 48: 1203-1212.
10
张勇,徐日炜,罗道友.导电炭黑对抗静电PA/PPO合金性能的影响[J].塑料,2017,46(6):9-11.
11
FILIPPONE G, DINTCHEVA N T, ACIERNO D, et al. The role of organoclay in promoting co-continuous morphology in high-density poly(ethylene)/poly(amide) 6 blends[J]. Polymer, 2008, 49: 1312-1322.
12
SACCHI A, LANDRO L D, PEGORARO M, et al. Morphology of isotactic polypropylene-polyamide 66 blends and their mechanical properties[J]. European Polymer Journal, 2004, 40: 1705-1713.
13
张风兰,王玉,赵文聘.接枝POE和EPDM增韧尼龙6的性能[J].塑料科技,2006,34(5):32-34.
14
WANG X D, LI H Q, RUCKENSTEIN E. Cooperative toughening and cooperative compatibilization: The nylon 6/ethylene-co-vinylacetate/ethylene-co-acrylic acid blends[J]. Polymer, 2001, 42: 9211-9216.
15
BHATTACHARYYA A R, MAITI S N, MISRA A. Mechanical properties and morphology of PA6/EVA blends[J]. Journal of Applied Polymer Science, 2002, 85: 1593-1606.
16
陆昶,胡小宁,赫玉欣,等.特殊形态结构导电高分子复合材料的电学性能[J].材料研究学报,2012,26(1):37-43.
17
WANG X, XU L, XU X B, et al. Effect of mixing process and morphologies on the electrical conductivity of PA6/EVA/CB composites[J]. Polymer-Plastics Technology and Engineering, 2011, 50(5): 533-538.
18
陶国良,任记真,夏艳平.无卤阻燃和永久抗静电PA6复合材料的制备与研究[J].现代塑料加工,2015,27(2):9-12.
19
BHATTACHARYYA A R, GHOSH A K, MISRA A, et al. Reactively compatibilised polyamide 6/ethylene-co-vinyl acetate blends: Mechanical properties and morphology[J]. Polymer, 2005, 46: 1661-1674.
20
顾宜,李海瑞.高分子材料设计及应用[M].北京:化学工业出版社,2011.
21
王天恒,赵雄燕,蔡啸,等.尼龙66基复合材料的研究进展[J].塑料科技,2012,40(12):94-99.
22
ZHANG Q, ZHANG B Y, WANG W J, et al. Highly efficient electrically conductive networks in carbon-black-filled ternary blends through the formation of thermodynamically induced self-assembled hierarchical structures[J]. Journal of Applied Polymer Science, 2018, DOI: 10.1002/app.45877.
23
SPEIRON F, CASTOLDI E, FABBRI P, et al. Mechanisms of energy dissipation during impact in toughened polyamides: A SEM analysis[J]. Materials Science, 1989, 24(6): 2165-2176.
24
孙文奎. CaSO4晶须/尼龙6复合材料的结构与性能研究[D].成都:西南石油大学,2017.
25
LEONARDO N S, ERICK G R A, GUILHERME F M M, et al. Development of antistatic packaging of polyamide 6/linear low-density polyethylene blends-based carbon black composites[J]. Polymer Bulletin, 2020, 77: 3389-3409.
26
THOMAS P, BROSSE A C, SYLVIE T G, et al. Co-continuous nanostructured nanocomposites by reactive blending of carbon nanotube masterbatches[J]. Polymer, 2012, 53(4): 984-992.
27
胡娟.炭黑填充尼龙6导电复合材料的制备及性能研究[D].北京:北京化工大学,2013.
28
TSNNG F P, LIN J J, TSENG C R, et al. Poly(oxypropylene)-amide grafted polypropylene as novel compatibilizer for PP and PA6 blends[J]. Polymer, 2001, 42: 713-725.
29
贺拓,胡益兴,赵小霞,等.废旧轮胎粉/POE-g-MAH复合改性PA6的制备与性能研究[J].包装学报,2015,7(2):21-27.

基金

精细化工应用技术泸州市重点实验室项目(HYJH-2308-B)

评论

PDF(1114 KB)

Accesses

Citation

Detail

段落导航
相关文章

/