【摘要】 采用浇注方法制备了纯聚氨酯(PU)、石墨/聚氨酯(C/PU)、铜/聚氨酯(Cu/PU)、石墨/铜/聚氨酯(C/Cu/PU)复合材料,并对PU及其复合材料的微观物相、微观结构、邵氏硬度、导热性能和力学性能进行了研究。结果表明,随着石墨、铜颗粒加入,复合材料的拉伸强度都比纯PU低;形貌表征结果显示,石墨、铜颗粒大部分均匀分散在PU基体中;材料导热系数都比纯PU高;除Cu/PU复合材料以外,C/PU、C/Cu/PU复合材料的硬度相比于纯PU都有一定程度的增加。更多还原

【Abstract】 Pure polyurethane( PU), graphite/polyurethane( C/PU), copper/polyurethane( Cu/PU), graphite/copper/polyurethane( C/Cu/PU) composite materials were prepared by casting method.The microscopic phase,microstructure,shore hardness,thermal conductivity and mechanical properties of polyurethane and its composites were investigated. The results show that with the addition of graphite and copper particles,the tensile strength of composite is lower than that of pure PU. Based on the morphological characterization of the prepared materials by scanning electron microscope( SEM),the graphite and copper particles are mostly dispersed in the PU matrix; the thermal conductivity of materials is higher than that of pure PU; the hardness of C/PU,C/Cu/PU composites both increase except for Cu/PU composites when compared with that of pure PU.更多还原