石墨／聚氨酯弹性体复合材料的制备及性能研究

采用原位插层聚合，通过预聚体法合成石墨／聚氨酯弹性体（PUE）复合材料，经X-射线衍射（XRD）和扫描电子显微镜（SEM）测试表明，石墨在聚氨酯弹性体中的分散性和相容性较好；当石墨质量分数小于15％时，随着石墨含量增加，PUE复合材料的拉伸强度、300％定伸强度、撕裂强度和扯断伸长率不断升高；石墨质量分数进一步增加到30％时，其相关力学性能又开始下降，硬度稍有增加。综合分析，PUE复合材料表现出较好的力学性能。

Synthesis and Characterization of Graphite/Polyurethane Elastomer Composites

The graphite/polyurethane elastomer composite was synthesized through pre-polymerized method by in situ intercalative polymerization technology. The X-ray diffraction and scanning electron microscopy （SEM） showed that the graphite was well dispersed in polyurethane matrix and had better compatibility. The tensile strength, 300% stretching strength, tearing strength and elongation at break were increased w.hen the graphite mass fraction less than 15%. The related mechanical properties were decreased and the hardness had a little increased when the graphite mass fraction increased to 30%. Comprehensive evaluation, the graphite/polyurethane elastomer composite had better mechanical properties.