Polyphenylene Sulfide-Tungsten 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. High tungsten content materials are ideal substitutes at present. However, for metal materials, its processing difficulty is very high, which limits its application in some fields.

Polyphenylene sulfide (PPS) is widely used as structural polymer material because of its excellent high temperature resistance, corrosion resistance, radiation resistance, flame retardant, balanced physical and mechanical properties and excellent dimensional stability. It is the only ideal material for radiation resistance in the field of atomic bomb and neutron bomb. As an indispensable protective material, the modification of polyphenylene sulfide (PPS) mask has important practical significance.

(1) Ingredients according to design formula

(2) 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 was dissolved in ethanol or acetone, diluted 3-5 times, sprayed into tungsten powder, mixed evenly, and then dried at 90 ~℃ to obtain surface modified tungsten powder.

(3) The surface modified tungsten powder, polyphenylene sulfide composite and other additives were mixed evenly in the high-speed mixer to obtain the mixture of tungsten powder and polyphenylene sulfide (PPS); the lubricant was added to the high-speed mixer to neutralize the mixture of tungsten powder and PPS, and the mixing temperature was 120 ℃.

(4) The lubricated tungsten powder and PPS mixture were mixed, extruded and pelleted in a 290 ℃ mixer to obtain injection moulding granular material. The granular material was put into the injection moulding machine and injected into the required standard test 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 ℃. It has good performance and mechanical properties of high-energy radiation shield, meets the requirements of environmental protection, and the preparation method is simple to operate.

• < Prev
• Next >