Abstract
Polystyrene grafted halloysite microspheres (MS@PMHNTs) were prepared by suspension polymerization method, and the MS@PMHNTs reinforced polymethyl methacrylate (PMMA) composite fibers were prepared by the in situ microfibrillation via a twin-screw extruder. The structure and mechanical properties of MS@PMHNTs/PMMA composite fibers were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric and tensile tests, respectively. The results show that MS@PMHNTs were torn, and connected head-tail connecting to form high-aspect ratio microfibrils during the shear-extrusion-drafting process. The PMHNTs in the microspheres have existed with a free orientation during the shearing process, while they were oriented in the microfibrils under the traction force. The MS@PMHNTs can significantly improve the toughness of PMMA, and MS@PMHNTs-5/PMMA has presented the best mechanical properties among all the composite fibers.
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