Remarkable enhancement of mechanical and tribological properties of polyamide 46/polyphenylene oxide alloy by polyurethane-coated carbon fiber

Abstract

How to significantly improve the mechanical and tribological properties of polyamide 46/polyphenylene oxide (PA46/PPO) alloy is an urgent but challenging issue. The PA46/PPO alloy reinforced with polyurethane-coated carbon fiber (PCF) was prepared and characterized. It was found that the mechanical properties, heat resistance, and tribological properties of PA46/PPO were greatly enhanced by incorporating PCF. When the composite containing 40 wt% of PCF, the tensile strength of the composite increased from 82 MPa to 282 MPa; meanwhile, volumetric wear was 0.56 mm3, which decreased by 95% in comparison with PA46/PPO. Scanning electron microscopy results showed that PCF had a good compatibility with the polymer matrix, due to good interfacial interaction between the PCF and the PA46/PPO. X-Ray photoelectron spectroscopy and laser Raman spectroscopy results further revealed that more graphitic carbon was microcracked to form a lubricating layer during friction process, thus remarkably improving the wear resistance of PA46/PPO.

Synthesis, Structures, and Properties of a New Pentaerythritol-Derived Flame Retardant Used in Polyamide 66

“…FTIR spectra were recorded on a Nicolet 6700 FT-IR instrument (Thermo Fisher, America) using a KBr disk. 1 H NMR and 31 P NMR spectra were measured by using a Bruker AVANCE III HD spectrometer (Bruker, Germany) using DMSO-d 6 as the solvent.…”

“…Engineering plastics such as polyamide resins have been broadly used because of their high mechanical performance. 1 − 3 In general, flame retardant (FR) is an essential additive for modifying those plastics to reach the flame retardancy standards of great technical significance, which decides the safety of the users. 4 , 5 Phosphorus-based FRs have received intensive attention in the past decades due to their potential high efficiency, arising from their versatile chemical structures.…”

“…Engineering plastics such as polyamide resins have been broadly used because of their high mechanical performance. − In general, flame retardant (FR) is an essential additive for modifying those plastics to reach the flame retardancy standards of great technical significance, which decides the safety of the users. , Phosphorus-based FRs have received intensive attention in the past decades due to their potential high efficiency, arising from their versatile chemical structures. , As is well known, the inorganic phosphorus-based FRs are developed with the generation of many industrial products which include ammonium polyphosphate, melamine polyphosphate, and aluminum hypophosphite . For example, aluminum diethylphosphinate is emerging as a powerful FR for polyamides, showing synergistic retardancy through capturing free radicals and char forming during the combustion process …”

Halogen Free Flame-Retardant Glass Fiber Reinforced PA 66 / PPO Alloys

“…The glass transition temperature (Tg) of polyphenylene ether is 210°C, which can maintain its good mechanical properties, ame retardant properties and electrical properties in a large temperature range. The dielectric properties of PPO are the best among the ve engineering plastics [3][4][5] . In addition, the dimensional stability of polyphenylene oxide is good at plastic cage, but the disadvantage of polyphenylene oxide is that it has a large melt viscosity and it is di cult to process.…”

“…However, the mechanical properties of the simple blend need to be improved due to the poor interface compatibility between PA66 and PPO. Therefore, some compatibilizers, such as high impact polystyrene and styrene-butene copolymer, were introduced to enhance the compatibility of the PPO/PA66 [2][3]5] .…”