Preparation and thermal/mechanical properties of nanocomposites

In order to promote technological progress in the field of materials and promote the development of related industries, research has been conducted on the preparation and thermal/mechanical properties of nanocomposites. Using polycarbonate (PC) nanocomposites as the base material and silane coupling agent KH570 as the organic modifier, the surface of MoS2 nanosheets peeled off by hydrazine hydrate pretreatment method was modified using organic modifiers. Then, the modified MoS2 nanosheets were used as fillers to prepare PC MoS2 nanocomposites, and infrared spectroscopy, thermogravimetric analysis, and tensile performance testing were conducted to achieve thermal and mechanical property analysis. After analysis, it was found that the modified MoS2 nanosheets formed good dispersion in PC nanocomposites. The prepared PC/KH570-MoS2 nanocomposites exhibited good thermal and mechanical properties, as well as good thermal stability and tensile properties. Moreover, when the modified MoS2 content was 3 wt. % at this time, its tensile strength, fracture elongation, and elastic modulus can reach 16.75 Mpa, 12.686%, and 5,741 Mpa, respectively. After repeated testing, the standard deviation and coefficient of variation of the results were small, with maximum values of 0.02 and 0.12, respectively, indicating the reliability of the obtained results.