Study On Dispersing Properties Of High Solid Polymer Composite Materials

With the development of society, the requirement on the properties of polyurethane materials have been higher and higher, thus pure polyurethane was unable to meet the needs of the market, then polyurethane composites materials has arised. The advantages and disadvantages of polyurethane composites mainly due to the disperse effect of inorganic particles between inorganic fillers and organic matrix. Therefore, high solid content (the content of solid particle mass is more than40%) of inorganic filler particle dispersion characteristics of polyurethane system research has become a hotspots.In this thesis, thermoplastic polyurethane elastomer (TPU) as the matrix, three different kinds of sizes range of KNO3for packing. High solid content was used to improve physical and mechanical properties of composite material and the quantitative characterization of dispersion of filler in the TPU substrate was studied.The results showed that:the four typical formulations which have high content of TPU materials (50%,60%,70%,80%(by mass)) were found to have special principles. With the increase of KNO3content in composite materials, composite materials density increased, and close to the theoretical density; The tensile strength of the material be enhanced, but with the increase of content-KNO3strength increase, The tensile strength also showed a trend of decline, thus the maximum content of TPU materials is50%, three times as many as raw material; Low-temperature impact strength showed by the toughness of the composite material is brittle gradient, the maximum intensity value is33.05KJ/m2; Scanning microscope (SEM) showed that the microstructure of FIG filler dispersed in the matrix, no significant agglomeration occurs; Fractal mathematical model based on a quantitative proposed to simulate the dispersion of the filler in the TPU matrix, the results show that the dispersion of the fitting parameters of the F ratio of the size of a composite material of different formulations under various process conditions were in the range of0to0.20, close to the optimum dispersion value of0.