PE-g-MAH对聚酰胺6/导电炭黑复合材料性能的影响  

Effect of PE⁃g⁃MAH on Properties of Polyamide 6/Conductive Carbon Black Composites

作　　者：李胤 周松[1] 鲁超飞 罗玉梅[1] 白小东[1] LI Yin;ZHOU Song;LU Chaofei;LUO Yumei;BAI Xiaodong(School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学新能源与材料学院,成都610500

出　　处：《中国塑料》2021年第3期44-49,共6页China Plastics

摘　　要：采用马来酸酐接枝聚乙烯(PE-g-MAH)以同时提高聚酰胺6/导电炭黑(PA6/CB)复合材料的抗静电性能和韧性,利用双螺杆挤出机和注射成型机制备了系列PA6/CB、PA6/PE-g-MAH和PA6/PE-g-MAH/CB复合材料,并通过扫描电子显微镜(SEM)、差示扫描量热仪(DSC)等观察和表征了材料的形貌和结晶性能,测试了材料的力学性能和抗静电性能。结果表明,添加7.5%(质量分数,下同)的CB后PA6韧性显著降低,CB对PA6结晶有异相形核作用;PE-g-MAH与PA6有较好的相容性,PE-g-MAH韧相能均匀分散在PA6和PA6/7.5%CB中;添加PE-g-MAH后可提高CB在PA6中的分散性,改变CB的选择性分布,提高PA6/PE-g-MAH/7.5%CB三元复合材料的电导性能;添加PE-g-MAH还可显著提高PA6和PA6/CB7.5%的冲击强度和断裂伸长率;添加少量PE-g-MAH能促进复合材料中PA6的结晶。Maleic anhydride‑grafted polyethylene(PE‑g‑MAH)was used to simultaneously improve the antistatic properties and toughness of polyamide 6(PA6)/carbon black(CB)composite.A series of PA6/CB,PA6/PE‑g‑MAH and PA6/PE‑g‑MAH/CB composites were prepared by melting extrusion and injection molding.Their morphologies and crystallization properties were investigated by using scanning electron microscopy and differential scanning calorimetry,and their mechanical and electrical properties were examined.The results indicated that the toughness of PA6 decreased significantly with the addition of 7.5 wt%CB.CB can generate heterogeneous nucleation on the crystallization of PA6.There is good miscibility between PE‑g‑MAH and PA6,resulting in a fine dispersion of PE‑g‑MAH in the PA6/CB matrix or PA6.The addition of PE‑g‑MAH improved the dispersion of CB particles and changed the selective location of CB in the PA6 matrix,leading to an increase in the electric conductivity of PA6/PE‑g‑MAH/CB ternary composites.PE‑g‑MAH can effectively improve the impact strength and elongation at break of pure PA6 and PA6/CB composite.A low content of PE‑g‑MAH can enhance the crystal formation of PA6 in the composites.

关 键 词：聚酰胺6 马来酸酐接枝聚乙烯 导电炭黑 微观形貌 电导性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]