Enhancing mechanical properties and magnetic performance of plastics magnet via mixing under vibration force field

Abstract

The vibration force field employed during polymer-based composite mixing has been proved of great effect on the morphology and the performance of product. Here the ferromagnet/PVC compound is firstly mixed via a self-devised vibrating tri-screw extruder and then molded into dumbbell samples which are afterwards pulse magnetized to make plastics magnet. After that, the effects of vibration force field on the mechanical properties and magnetic performance of plastics magnet is experimentally investigated. The results indicate that both the quality targets of the specimens change significantly with the employing of vibration force field. Compared with those prepared under stable status (non-vibration), the tensile strength and the elongation at break of the specimens elevate, respectively by 17.1 and 37.7% at most, while the maximum increase of remanence, coercive force, intrinsic coercive force and magnetic energy product are 8, 5, 5 and 11%, respectively. The morphologies of specimens have also been studied with SEM in order to search the proof for the change of the product performance. The results of microstructure analysis show that vibration force field improves the blending effectively, which are consistent with the change of the mechanical properties and magnetic performance of plastics magnet under vibration force field.