聚氨酯/纳米金刚石纳米复合材料的性能研究

通过原位反应法制备了聚氨酯(PU)/纳米金刚石(ND)纳米复合材料,采用X射线衍射(XRD)、热失重分析(TGA)、扫描电子显微镜(SEM)和力学性能测试等手段系统研究了PU/ND纳米复合材料的力学性能、热性能和形态。研究结果表明,ND能够显著提高聚氨酯的力学性能。随着ND用量的增加,PU/ND纳米复合材料的拉伸强度、100%定伸应力、500%定伸应力和断裂伸长率先增加后减少。当ND质量分数为0.5%时,PU/ND纳米复合材料的力学性能最佳,拉伸强度和断裂伸长率分别提高了61.5%和39.1%。PU/ND纳米复合材料的T-剥离强度和耐热性也有提高。

Properties of Polyurethane/Nanodiamond Nanocomposites

Polyurethane(PU)/nanodiamond(ND)nanocomposites were prepared by in-suit reaction method.The mechanical performance,thermal properties and morphological were investigated by X-ray diffraction(XRD)analysis,thermogravimetric analysis(TGA),scanning electron microscope(SEM)and mechanical properties tests.The results indicate that ND could improve the mechanical performance of PU/ND nanocomposites.With the increasing of ND contents,the tensile strength,the stress at 100%and 500%fixed elongation and the elongation at break of PU/ND nanocomposites increase first and then decrease.When the ND content is 0.5%,PU/ND nanocomposites could obtain the best mechanical properties,the tensile strength increases 61.5%and the elongation at break increases 39.1%.The addition of ND could also increase the T-peel strength and thermal stability.