The composite of high strength and high modulus reinforcing fiber and PPS resin can improve the poor brittleness and impact resistance of PPS. While improving the properties of composite materials, the production cost is greatly reduced. At present, the commonly used reinforcing fibers are glass fiber, carbon fiber, basalt fiber and aramid fiber.

1 Glass fiber reinforced

It is believed that glass fiber will act as heterogeneous nucleating agent in PPS matrix resin, making PPS molecules crystallize around the surface of glass fiber. When the composite is impacted by an external force, the stress will be better transmitted to the fiber, thus playing a reinforcing role. Wang Gang et al. studied the effects of glass fiber and modified polymer on the mechanical properties of PPS/GF composites by preparing them. The results show that the glass fiber is less covered by PPS resin, which is due to the weak interfacial adhesion between the matrix resin and the filler. When impacted by an external force, the material will brittle fracture.

After PPS was pre toughened with modified polystyrene (PS), the impact strength of the composite was significantly improved. Chen Xiaoyuan et al. prepared PPS/GF composites, and studied the influence of screw shear elements and glass fiber content on the mechanical properties of the materials. The results showed that increasing the number of screw shear blocks would increase the shear strength of resin and fiber, which could improve the dispersion of fiber in the resin, but also easily cause damage on the fiber surface; The reduction of the number of shear blocks will lead to an increase in torque, which is not conducive to the use of equipment.

2 Carbon fiber reinforced

Carbon fiber has the advantages of light weight, high strength, low conductivity, heat conduction and expansion coefficient. PPS/CF composites are widely used in aerospace, military and other fields. Many studies have been carried out on carbon fibers because of their few surface active groups and the difficulty of resin wetting. Zhang Kun et al. coated CF with epoxy resin tetraglycidyl-4,4 '- diaminodiphenyl ether (TGDDE) and studied the effect of TGDDE content on the mechanical properties of PPS/CF composites. The results showed that the impact strength of the composites increased with the increase of TGDDE content. When the content of TGDDE was 2%, the impact strength increased by 24%. It can be seen from the scanning electron microscope photos of the impact fracture surface that a small amount of interface modifier can make polyphenylene sulfide resin adhere to the surface of carbon fiber, and the adhesion between PPS and fiber is increased, so the impact strength of the composite is improved.

3 Other fiber reinforcement

Yu et al. prepared Kevlar fiber reinforced PPS composites by molding, and studied their friction properties and high-temperature boiling resistance. The results show that a thin and uniform migration film is formed inside the material after adding Kevlar fiber, and the wear resistance is improved. On the other hand, the interfacial bonding between Kevlar fiber and PPS can be improved by introducing epoxy groups onto the surface of Kevlar fiber, and the high temperature boiling resistance of the composite can be improved under the same conditions. Ouyang Neng et al. explained the micro mechanism of PPS reinforced by aramid fiber through molecular mechanics calculation: after epoxy group was introduced into aramid fiber, the electrostatic effect and van der Waals force of the composite system were improved, and the total energy of the interface system was significantly reduced, indicating that the mutual attraction of the two component molecules was improved, and the structural stability of the interface was improved.