Preparation of maleic anhydride/methyl methacrylate double monomer grafted poe and its effect on the properties of pa610 alloys

Two monomers, maleic anhydride (MA) and methyl methacrylate (MM), were used with ethylene-octene copolymer elastomer (POE) to prepare a highly efficient toughening agent (POE-g-MA/MM) by melt grafting method in a twin-screw extruder, which had a relative grafting rate of 0.93%. Then, a series of PA610 alloys with different contents of POE-g-MA/MM were prepared by melt blending of POE-g-MA/MM and PA610 (PA610/POE-g-MA/MM), and their microstructure, mechanical properties, molding shrinkage, water absorption and thermal properties were studied. The results showed that the SEM photos of the alloys obvious 'sea-island' structure, the interfacial compatibility between the two phases was good, and the phase domain size was 0.15–0.35 μm. When the content of POE-g-MA/MM was 20%, the room-temperature impact strength and low-temperature impact strength of the alloys were 78.9 kJ/m² and 72.6 kJ/m², which were increased by 13.15 and 14.81 times, respectively. Even though the strength decreased slightly, the retention rate was still higher than 66.5%. The water absorption rate was 1.18%, which was reduced by 42.4%, and the molding shrinkage rate increased slightly. Moreover, the hot deformation temperature was slightly reduced, and the retention rate could reach 93.5%. The research work of this paper improves the added value of PA610 products, broadens its application fields, and provides a reference for subsequent toughening modification research and industrialization.