How to Prepare Polyphenylene Sulfide-Tungsten Powder High Energy Ray Shield Composites

In recent years, lead-containing materials are being gradually eliminated due to their high pollution, high toxicity, low strength and low efficiency. It is hoped that high-energy polymer composites with good processability will be developed to expand the application of metal materials.

It was found that the PPS-W powder high energy ray shielding composites had good shielding properties and mechanical properties. The preparation method includes:

According to the ratio: coupling agent aminoethyl aminopropyl triethoxysilane 0.45wt%; tungsten powder 92.5wt%; polyphenylene sulfide (PPS) 6.8wt%.

300 ml ethanol was added to 1.5 kg tungsten powder, and then mixed in a high-speed mixer for 5-10 minutes. The coupling agent is dissolved in ethanol or acetone, diluted 3-5 times, sprayed into tungsten powder and mixed evenly, then dried at 90 ~℃ to obtain surface modified tungsten powder. Then the surface modified tungsten powder, polyphenylene sulfide composite material and other additives are mixed evenly in a high-speed mixer to obtain tungsten powder and polycondensation. The mixture of phenylene sulfide (PPS); the lubricant was added into the high-speed mixer and the mixture of tungsten powder and PPS was mixed evenly at 120 ℃; finally, the lubricated tungsten powder and PPS mixture were mixed, extruded and pelleted in a 290 ℃ mixer to obtain injection-moulding granules, and the granules were put into the injection machine, and then the injection-moulding granules were injected into the injection-moulding machine and shoot the required sample.

The results show that the performance of high energy ray mask is slightly lower than that of lead with the same thickness, the tensile strength is more than 55.0 MPa, the bending strength is more than 130.0 MPa, and the thermal deformation temperature is more than 187 ℃.

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