Electrical nanocomposites of PA6/ABS/ABS‐MA reinforced with carbon nanotubes (MWCNTf) for antistatic packaging

Abstract

Herein, we prepared toughened and electrical nanocomposites of polyamide 6 (PA6)/acrylonitrile‐butadiene‐styrene (ABS) compatibilized with maleic anhydride‐grafted acrylonitrile‐butadiene‐styrene (ABS‐MA). Functionalized multi‐walled carbon nanotubes (MWCNTf) were used as conductive nanofillers. Nanocomposites were processed in an internal mixer and injection molded. Torque rheometry, impact strength, elastic modulus, heat deflection temperature (HDT), differential exploratory calorimetry (DSC), melting and crystallization kinetic curves, electrical conductivity, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were evaluated. Torque increased with the MWCNTf content in the PA6/ABS/ABS‐MA/MWCNTf nanocomposites, suggesting an increase in viscosity. The MWCNTf were well dispersed in the nanocomposites, generating an electrical percolation path. The impact strength of the PA6/ABS/ABS‐MA/MWCNTf nanocomposites was superior to that of pure PA6, indicating improved flexibility and toughness. The addition of 1 pcr of MWCNTf in the PA6/ABS/ABS‐MA system was sufficient for antistatic application, with a 221% higher impact strength, compared to pure PA6. The DSC studies showed that the crystallization temperature of the nanocomposites shifted to higher temperatures. This was due to the MWCNTf that accelerated crystallization. Additionally, the nanocomposites HDT increased by 20°C compared to the PA6 matrix, suggesting a superior thermomechanical strength. The developed nanocomposites show improved mechanical, electrical, and thermomechanical properties. Therefore, they exhibit great technological potential for application in antistatic packaging.

On the Production of Poly(Lactic Acid) (PLA) Compounds with Metallic Stearates Based on Zinc, Magnesium and Cobalt. Investigation of Torque Rheometry and Thermal Properties

“…The method for measuring the viscosity of polymeric systems in the torque rheometer has been reported in the literature. 65 In Table 1, it was found that PLA had the highest viscosity, with values in the order of 311.7 Pa.s, suggesting higher molecular weight. Adding Co and Zn stearates to the PLA matrix reduced the torque to 150.3 Pa.s and 102.9 Pa.s, corresponding to decreases in the order of 51.7% and 67.1%, respectively, related to PLA.…”

Extraction of natural fibers of Catole coconut (Syagrus Cearensis): Application as reinforcing filler in polypropylene‐based composites

“…The HDT is a key parameter for quality control in the plastics industry 77,78 . The HDT evaluates the structural stability limits of a polymer subjected to thermal and mechanical stresses 79 . In other words, it measures a material's stiffness or ability to stay rigid and maintain shape integrity under simultaneous heating and constant loading.…”

“…77,78 The HDT evaluates the structural stability limits of a polymer subjected to thermal and mechanical stresses. 79 In other words, it measures a material's stiffness or ability to stay rigid and maintain shape integrity under simultaneous heating and constant loading. The HDT was determined to study the structural stability of neat polypropylene and the PP/CCP composites under mechanical and thermal stress.…”

Tailoring polyamide 6 to exhibit super‐tough behavior and high thermomechanical stability: The role of AES and EPDM‐MA hybridization

“…This method increases the toughness while the tensile strength, elastic modulus, and heat deflection temperature (HDT) decrease proportionally to the elastomer concentration. ABS (acrylonitrile‐butadiene‐styrene), an impact modifier for engineering polymers, has been extensively used to address these issues and balance mechanical and thermomechanical properties 28–30 . Direct mixing of PA6 and ABS produces an immiscible and incompatible material with poor mechanical properties.…”

“…ABS (acrylonitrile-butadiene-styrene), an impact modifier for engineering polymers, has been extensively used to address these issues and balance mechanical and thermomechanical properties. [28][29][30] Direct mixing of PA6 and ABS produces an immiscible and incompatible material with poor mechanical properties. Therefore, compatibilizing agents have been incorporated into PA6/ABS blends to improve their properties, establish a stable morphology, and create a more extensive processing window.…”