Influence of halloysite nanotubes and intumescent flame retardant on mechanical and thermal properties of 80/20 (wt/wt) PP/ABS blend and their composites in the presence of dual compatibilizer

Abstract

Halloysite nanotubes (HNTs) and intumescent flame retardant (IFR)-filled 80/20 (wt/wt) polypropylene/acrylonitrile–butadiene–styrene (PP/ABS) blend and their composites in the presence of dual compatibilizer have been prepared using twin screw extruder followed by injection molding. There exists the formation of α- and β-form of PP crystals in addition to enhancement in crystallinity of PP phase by an addition of HNTs and IFR in 80/20 (wt/wt) PP/ABS blend and their composites in the presence of dual compatibilizer. In addition, scanning electron microscopy (SEM) reveals the formation of matrix-droplet morphology, and the dispersion of HNTs and IFR in 80/20 (wt/wt) PP/ABS blend and its composites in the presence of dual compatibilizer results in a refinement in matrix-droplet morphology. This has resulted in an enhancement in tensile and impact properties of HNTs- and IFR-filled 80/20 (wt/wt) PP/ABS blend and their composites in the presence of dual compatibilizer. Thermal stability also increases by an addition of HNTs and IFR in 80/20 (wt/wt) PP/ABS blend and their composites in the presence of dual compatibilizer due to formation of intumescent char.

Halloysite Nanotubes and Silane-Treated Alumina Trihydrate Hybrid Flame Retardant System for High-Performance Cable Insulation

“…Therefore, one can modify the sample surface (e.g., silane modification) or mix it with other nanofiller in order to obtain a hybrid system of fillers with a positive hybrid effect on improving thermal stability and flame retardancy. HNTs are such a nanofiller that could significantly enhance the compactness and thermal stability of the barrier layer and improve the flame retardancy efficiency of different polymer matrices [ 17 , 18 , 19 , 42 ]. The barrier layer covering the polymer matrix surface could effectively cut off the heat and material exchange between the polymer matrix and the combustion flame zone and prevent further degradation [ 48 ].…”

“…Halloysite nanotubes have been used to prepare a novel intumescent flame retardant (IFR) poly(butylene succinate) with anti-dripping properties [ 18 ]. HNTs and IFR filled (80 wt.%/20 wt.%) polypropylene (PP)/acrylonitrile butadiene styrene (PP/ABS) blends have been prepared using a twin-screw extruder [ 19 ]. Tensile and impact properties as well as thermal stability and flame retardancy increased with the addition of HNTs and to the PP/ABS blend.…”

Properties and Modification Methods of Halloysite Nanotubes: A State-of-the-Art Review

“…The enrichment of crystallinity of PP phase was observed owing to formation of α-and β-form of PP crystals and advantageously using HNTs and IFR in 20/80 (wt/wt) ABS/PP blend and it composites using dual compatibilizer. Thermal stability was also improved 30 . In another study ABS/PP blends and its composites in presence of dual compatibilizer were prepared.…”

Influence of halloysite nanotubes onto the fire properties of polymer based composites: A review

“…Saheb et al [94] also studied some polymer blends with ABS such as PP/ABS (80/20) and they added HNT and ammonium polyphosphate/pentaerythritol (6:1 wt/wt) as IFR into PP/ABS. Moreover, PP-g-MA and styrene-ethylene, butylene-styrene triblock copolymer grafted with maleic anhydride (SEBS-g-MA) were used as compatibilizers to enhance the dispersion of the fillers.…”