The Effect of Oxygen‐Plasma Treated Graphene Nanoplatelets upon the Properties of Multiwalled Carbon Nanotube and Polycarbonate Hybrid Nanocomposites Used for Electrostatic Dissipative Applications

Abstract

Oxygen-plasma treated graphene nanoplatelet (OGNP), multiwalled carbon nanotube (MWCNT) and polycarbonate (PC) hybrid nanocomposites were prepared via a melting process using a twin-screw extruder. The contents of the OGNPs were in the range of 0.0 to 5.0 parts per hundred resin (phr), whilst the dosage of MWCNTs was kept at a constant of 2.0 wt%. Nanocomposites containing 2.0 wt% of MWCNTs and mixtures of 2.0 wt% of MWCNTs at 1.5 to 5.0 phr of OGNPs had tribocharged voltages, surface resistivities, and decay times, all within the electrostatic discharge (ESD) specification. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results revealed that the OGNPs slightly intercalated and distributed also within the PC matrix. The glass transition temperatureTgand heat capacity jump, at the glass transition stages of nanocomposite, slightly changed, as the contents of the OGNPs increased. The melt flow index (MFI) of nanocomposites significantly decreased when MWCNTs were added to the PC resin and slightly changed as the dosage of OGNPs was increased. Tensile Young’s modulus of nanocomposites tended to increase, as the elongation at break and impact strength decreased, when OGNP concentrations were increased. This research work exhibited that OGNP/MWCNT/PC hybrid nanocomposites do indeed have the potential to be used in ESD applications.

Dielectric, mechanical and transport properties of bisphenol A polycarbonate/graphene nanocomposites prepared by melt blending

“…Nevertheless, those chains that cannot participate in the glass transition process do not significantly affect the average T g value, as determined by DSC . Similar T g values were reported by Poosala et al . for GnP/multi‐walled carbon nanotube (MWCNT)/PC hybrid nanocomposites.…”

Polymer Composites Based on Polycarbonate (PC) Applied to Additive Manufacturing Using Melted and Extruded Manufacturing (MEM) Technology

“…Lowering the MFR of the tested composites containing these fillers is also described in the literature [32], but the decrease in the obtained results did not change the processing conditions and the flow behavior of PC. The reduction in MFR values can be attributed to the emerging interconnected networks of nanotubes that hinder the molecular movement of the polymer chains [27,36,37] Unfortunately, we do not see this for composites containing unmodified CN filler [32][33][34]. The decrease in MFR ranges from −3.28% to −12.11% and indicates that the viscosity of the system increases after the addition of multiwalled carbon nanotubes PC/0.5%CN and the filler combination PC/0.5%CN/1.5%S, PC/0.5%CN/1.5%L [35,36].…”

“…The reduction in MFR values can be attributed to the emerging interconnected networks of nanotubes that hinder the molecular movement of the polymer chains [27,36,37] Unfortunately, we do not see this for composites containing unmodified CN filler [32][33][34]. The decrease in MFR ranges from −3.28% to −12.11% and indicates that the viscosity of the system increases after the addition of multiwalled carbon nanotubes PC/0.5%CN and the filler combination PC/0.5%CN/1.5%S, PC/0.5%CN/1.5%L [35,36]. Lowering the MFR of the tested composites containing these fillers is also described in the literature [32], but the decrease in the obtained results did not change the processing conditions and the flow behavior of PC.…”

Thermal, Mechanical, and dielectric properties of Injection Molded Graphene Nanocomposites Based on ABS/PC and ABS/PP Blends

“…Decrease of MFI of pure PC was also observed by the addition of CNTs due to the increase of viscosity due to the formation of a network by CNTs . Poosala et al observed that the MFI of oxygen‐plasma treated graphene nanoplatelet (OGNP)/CNT/PC nanocomposites decreased, but not proportionally with the increase of OGNP content, due to their poor dispersion and intercalation within the polymer matrix. Ádámné and Belina observed that CNTs slightly decreased the MFI value of ABS/PC blend.…”