Compared with PPS/PC, PPS/nylon (PA) is a blending modification system with more mature research and industrialization. The solubility parameters of PPS and PA are 12.5 and 13.6 respectively, which means that the amorphous parts of PPS and PA have good thermodynamic compatibility and can be miscible in almost any proportion at high temperatures.

Mai et al. mainly studied the non isothermal crystallization behavior of PPS/PA6 blends. Compared with pure PPS and PA6, the change of crystallization behavior of PPS in the blend system is greater than that of PA6. The crystallization temperature of PPS in the system is always higher than that of pure PPS, and the crystallization temperature depends on the melting temperature and crystallization time.

The crystallization peak of PPS narrowed and the crystallization temperature shifted to high temperature, indicating that the crystallization rate of PPS increased after blending with PA6. Mai believed that the change of PPS crystallization behavior was mainly due to heterogeneous nucleation effect caused by interfacial tension between PPS and PA6. Chen et al. mainly studied the mechanical properties and friction properties of PPS/PA66 blends. The experiment proved that PPS and PA66 are a two-phase system structure. The tensile strength, flexural strength and impact strength of the blends containing 30vol% PPS are the best, while 80vol% PA66-20vol% PPS has the lowest friction loss. During the friction process, the crystalline phase structure of PPS and PA66 changed, and the friction coefficient of the blend system depended on PA66 components and the degree of adhesion between the two phases.

Generally speaking, after heat treatment, PPS containing residual reactive monomers has a slight branching or cross-linking bond in the chain structure due to thermal oxidative cross-linking reaction, resulting in poor melt fluidity. The rheological property test results show that PA66 can improve the fluidity of PPS. When PA66 accounts for more than 50%, the melt flow rate (MFR) of the blends increases significantly, while the melt viscosity of the blends decreases by an order of magnitude. Compared with the pure reinforced PA66, the use temperature was increased, the water absorption of PA66 was significantly decreased, and the dimensional stability of the product was improved; Due to the relatively low price of PA66, the cost of PPS/PA66 alloy is significantly reduced, thus expanding the application scope of the material.