Thermal stability of melt-blended poly (lactic acid) (PLA)/polyamide 66 (PA66)/graphene nanoplatelets (GnP)

Abstract

In recent times the blending of different biodegradable materials to produce nanocomposites with improved properties has been a significant point of discourse by many researchers. This study reports a melt blend of poly (lactic acid) (PLA), polyamide (Nylon 66) and graphene nanoplatelets (GnP). The thermal stability and chemical functional characteristics of the nanocomposites produced were succinctly investigated using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR). The blending was carried out by using a twin-screw extruder at a revolution speed and time of 50 rpm and 20 minutes, respectively. The composition of GnP in the PLA/PA66 was varied from 0 – 5 wt.%. The results showed that the increased of the GnP concentrations improved the thermal stability of the nanocomposites. It was also observed that a strong interaction between the polymeric materials as demonstrated by the FTIR analysis. The use of a low concentration of graphene in PLA/PA66 blend has been demonstrated to improve the thermal stability of the nanocomposites.

Green Bionanocomposites of Poly(Lactic Acid) (PLA) and Linear Low-Density Polyethylene (LLDPE): Fabrication and Properties

“…Figure 3b shows the maximum temperature of deterioration for all blends in the derivative thermogravimetric (DTG) curve. Due to the immiscibility of the two polymers, the DTG curves showed two peaks, one for PLA and one for LLDPE, indicating that the PLA and LLDPE decomposed separately [3], [11]. Differential Scanning Calorimetry (DSC) Analysis.…”

“…In addition, nano-fillers, such as graphene, graphite oxide, and reduced graphite oxide, can be incorporated into the polymer to improve the mechanical, thermal properties of the polymer and have a very large surface area [9]. In addition, uniformly distributed graphene, its enhanced structural, thermal, and physical attributes will also result in better mechanical properties [10], [11]. In this study, we combined LLDPE and PLA with compatibilizer, filler, and nanofiller.…”

Statistical Study on the Interaction Factors of Polypropylene-Graft-Maleic Anhydride (PP-g-MA) with Graphene Nanoplatelet (GNP) at Various Poly(Lactic Acid)/Polypropylene (PLA/PP) Blends Ratio

“…Apart from that, incorporation of nanofiller into the blends also serves a significant impact on the final properties of nanocomposites, such as mechanical, thermal, morphology, and interfacial properties [20][21][22]. In recent years, many papers reported on PLA/PP blends reinforced with clay [23][24], multi-walled carbon nanotubes [25], and sepiolite [26].…”