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The noninvasive and nondestructive Fourier transform infrared (FTIR) imaging and dynamic mechanical analysis (DMA) are developed in this work to evaluate the microstructure-related properties of UHMWPE/Recycled-PA6 blends. FTIR imaging which is of in-situ and visualizing capabilities is shown to be extremely valuable in determining the phase structure of a multiphase system. It is found that small quantities of the HDPE-g-MAH compatibilizer could significantly improve the miscibility of the two immiscible polymers. It is further proved that in the UHMWPE/R-PA6 blends the R-PA6 phase distributes continuously, while the UHMWPE phase disperses in a discontinuous manner. Moreover, the blends with 44 wt% R-PA6 is found to exhibit an optimal miscibility behavior. This work demonstrates that FTIR imaging is a direct method in visualizing the miscibility of polymer blends. The combined FTIR imaging and DMA testing offers a new approach for qualitative and quantitative investigations on polymer blends with complex microstructures.

With the emergence and development of computer technology, it has been used in many fields of production and life. Especially in the production of chemical industry, the role of computer-aided software can not be underestimated. As a research hotspot in the field of fine chemical industry in recent years, adhesive wear-resistant coating can not only make the coating stronger, but also fundamentally save resources. Therefore, it is necessary to develop its materials and analyze the wear mechanism. In this study, the basic information of adhesive wear-resistant coating, the method of developing adhesive wear-resistant coating based on computer, and the wear mechanism and influencing factors of adhesive wear-resistant coating are discussed, which provides a methodology for solving this problem.

In order to improve the friction and wear performance of steel under severe service conditions such as high temperature, epoxy resin E-51 resin is used as the base material, graphite, MoS2 and other high temperature wear-resistant materials are used as pigments to prepare a kind of oil-coated high temperature resistant paint. The entropy weight method is used to comprehensively evaluate high temperature wear, thermal weight loss rate, and corrosion current density. The results show that the coating optimized by the entropy weight method has excellent performance. Among them, the high temperature wear rate of the paint film is 0.83%, the thermal weight loss rate at 200 °C is 4.56%, the thermal weight loss rate at 400 °C is 27.84%, and the corrosion current density is 9.31E-9. The alkali resistance of the paint film is far greater than the national standard.

In ceramic-metal joints, how to select the interlayer materials is a very important problem. Two main conditions should be satisfied for an optimal insert metal: high diffusivity and reactivity to ceramic to get enough strength of interface, and the reduction of residual stresses resulting from the thermal expansion dismatch. In this paper, thermal elastic-plastic FEM is used to analyze the residual stress in Si3N4-1Cr18Ni9Ti diffusion bonding. The research shows the effects of the joints' type, property and thickness of insert metals on the reduction of residual stresses. It can be concluded that the maximum tensile stress in ceramic usually occurs just on the cylindrical surface near the interface, which is the fatal damage to ceramics. Two kinds of interlayers, the soft metal and low expansion metal with certain thickness, can be employed to reduce the maximum stress. Calculation shows the composite interlayer by both above metals is the proper insert material, the maximum tensile stress in ceramics can be reduced to minimum, and the bending test demonstrates that the strength of Si3N4-lCrl8Ni9Ti joint with the optimal composite interlayer is over 260 MPa.