Abstract
Waterborne polyurethane composites containing silica nanoparticles are synthesized successfully via the in situ polymerization. The structure, thermal stability, surface hardness, tensile strength, UV-Vis absorbance, dynamic mechanical properties and chemicals resistance of the resulting composites are investigated by FTIR, TEM, TGA, UV-Vis, DMA and chemicals soakage measurements. Results show that polyurethane molecules and silica nanoparticles are linked with covalent bonds. As a result, physical properties of polyurethane composites, such as thermal stability, surface hardness, weather and chemicals resistance are all improved when an appropriate concentration of silica nanoparticles are incorporated.
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This work was financially supported by the Open Fund of Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province (No. Kfjj-10-05), and “Qing Lan” Talent Engineering Funds by Lanzhou Jiaotong University (No. QL-08-03A).
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Feng, Lb., Wang, Yp., Qiang, Xh. et al. Effect of silica nanoparticles on properties of waterborne polyurethanes. Chin J Polym Sci 30, 845–852 (2012). https://doi.org/10.1007/s10118-012-1175-6
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DOI: https://doi.org/10.1007/s10118-012-1175-6