The invention relates to the technical field of
engineering plastics, and discloses a modified
engineering plastic and a preparation method thereof.The preparation method comprises the steps that S1, polyphenyl
sulfone resin and functional filler are sequentially added into double-screw
melt blending equipment, mixing is conducted under preset conditions, and premixed master batches are obtained, the functional filler comprises an
interface bonding strength enhancing unit, a crosslinking unit and a
thermal expansion coefficient adjusting unit; and S2, spraying a dilute solution containing a functional auxiliary agent on the premixed master batch at a preset temperature,
drying and curing the dilute solution on the surface of the premixed master batch through hot air, stretching in a stretching
machine head, and annealing to obtain the functional aggregate with interfacial activity and a surface oriented structure. According to the modified
engineering plastic and the preparation method thereof, the
bonding strength, the use stability and the environment durability and reliability of the molten modified
engineering plastic and an aluminum
alloy material are improved by reducing the thermal
cycling stress and the mechanical
interlocking performance and keeping the consistency of the modified
engineering plastic.