Enhanced Mechanical Properties for ABS / CNTs Composites With Excellent Antistatic Performance via Reactive Extrusion Technology

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The inherent insulating properties of acrylonitrile‐butadiene‐styrene copolymer (ABS) constrain its applications in electrical and electronic fields. The introduction of conductive fillers such as carbon nanotubes (CNTs) can effectively enhance the electrical conductivity of ABS. However, CNTs tend to agglomerate and exhibit weak interfacial interactions with the matrix, resulting in significant deterioration of the mechanical properties of the composites. In this work, hydroxylated carbon nanotubes (CNTs‐OH) were selected as fillers and covalently bonded with epoxidized glycidyl methacrylate grafted acrylonitrile butadiene styrene (ABS‐g‐GMA) by reactive extrusion technology to fabricate ABS‐g‐CNTs. The ABS/ABS‐g‐CNTs composites are manufactured by filling ABS‐g‐CNTs pellets into the ABS matrix via melt blending. The chemical grafting approach simultaneously improves the interfacial bonding strength between CNTs and ABS while achieving uniform dispersion of CNTs within the polymer matrix. Compared with the ABS/CNTs composites, the ABS/ABS‐g‐CNTs composites exhibited a 107% improvement in impact strength, reaching 89.0 J/m. Importantly, the volume resistivity significantly decreased to 1.0 × 108 Ω cm, meeting the standards for antistatic materials. These findings propelled theoretical innovations and technological breakthroughs in ABS‐based conductive composites.