The interface structure of nano-SiO2/PA66 composites and its influence on material's mechanical and thermal properties |
| |
| Authors: | Xiangmin Xu Huimin Lu Honggang Wang |
| |
| Affiliation: | a Key Lab for Special Functional Materials, Henan University, Kaifeng, Henan 475000, China
b State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China |
| |
| Abstract: | The PA66-based nanocomposites containing surface-modified nano-SiO2 were prepared by melt compounding. The interface structure formed in composite system was investigated by thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The influence of interface structure on material's mechanical and thermal properties was also studied. The results indicated that the PA66 chains were attached to the surface of modified-silica nanoparticles by chemical bonding and physical absorption mode, accompanying the formation of the composites network structure. With the addition of modified silica, the strength and stiffness of composites were all reinforced: the observed increase depended on the formation of the interface structure based on hydrogen bonding and covalent bonding. Furthermore, the differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) showed that the presence of modified silica could affect the crystallization behavior of the PA66 matrix and lead to glass transition temperature of composites a shift to higher temperature. |
| |
| Keywords: | Interface structure Nano-SiO2 Thermal properties Mechanical properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
