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以热塑性聚氨酯弹性体(TPU)和氢氧化铝(ATH)为主要原料,采用熔融共混法制备复合材料,着重研究了TPU/ATH复合材料的力学性能、热性能和燃烧性能。结果表明:ATH的加入量为20%时,处理的和未处理的ATH的共混体系300%拉伸强度达到最大,分别为8.87MPa和6.30MPa。ATH加入量大于10%时,复合材料的燃烧性能得到明显的改善。从DSC图谱上看,复合材料硬段的玻璃化转变温度、受热分解温度相比于纯TPU都有一定程度的提高。XRD实验结果表明ATH的加入增强了复合材料的结晶性,从而提高了复合材料的热稳定性。SEM照片显示:ATH含量小于20%时,ATH比较均匀的分布在共混体系中。当ATH含量为25%时,可以看到明显的团聚现象。
The thermoplastic polyurethane elastomer (TPU) and aluminum hydroxide (ATH) as the main raw materials were prepared by melt blending method. The mechanical, thermal and combustion properties of TPU / ATH composites were studied. The results showed that 300% tensile strength of ATH blends reached the maximum at 20% ATH, 8.87 MPa and 6.30 MPa, respectively. When the amount of ATH is more than 10%, the combustibility of composites is obviously improved. From the DSC chart point of view, the glass transition temperature of the hard segment of the composite material, the thermal decomposition temperature compared to pure TPU have a certain degree of improvement. XRD results show that the addition of ATH enhances the crystallinity of the composite, thereby improving the thermal stability of the composite. The SEM images show that the ATH content is less than 20% and the ATH is more evenly distributed in the blend system. When the ATH content is 25%, significant agglomeration can be seen.