【摘要】 通过三种方法制备了碳纳米管(CNTs)改性的热塑性聚氨酯弹性体(TPU),研究了碳纳米管对热塑性聚氨酯弹性体的增强、增韧效果。考察了TPU/CNTs复合材料的力学性能、热性能及流变性能。结果表明,碳纳米管能有效地实现对TPU的增强和增韧,在CNT含量为1%时,拉伸强度从54.6 MPa提高到66.0 MPa,断裂伸长率从684%提高到801%。SEM表明CNT在TPU中分散性良好。通过XRD、DSC和TGA表征了复合材料的微观结构和热性能。更多还原

【Abstract】 Carbon nanotubes(CNTs) modified thermoplastic polyurethane(TPU) elastomer was prepared by three different methods and the reinforcing and toughening effect of CNTs on TPU elastomer was studied.The mechanical,thermal and rheological properties of the CNTs/TPU composites were studied.The results show that CNTs can effectively strengthen and toughen the polyurethane elastomer,and at the content of 1% CNTs,the tensile strength and elongation at break of elastomer increases from 54.6 MPa to 66.0 MPa by ～ 21% and 684% to 801% by ～ 17% respectively.SEM photos show a good dispersion of CNTs in TPU matrix.DSC,XRD and TGA were employed to characterize the microstructure and thermal properties of the composites.更多还原