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该文通过对缓冲材料的微观结构和红外光谱分析,验证了其网状交联结构的存在性,并在此基础上对不同膨化倍数缓冲材料进行静态压缩试验、蠕变试验和四次压缩回弹试验,测定该材料的力学性能。试验结果表明,该缓冲材料的残余应变随膨化倍数的增加而逐渐提高,而其回弹厚度随膨化倍数的增加而逐渐减少;该缓冲材料的蠕变值早期快速提高,后期变化很小且呈直线趋势,卸载24 h后的残余应变在半h内急剧下降,而后逐渐趋于缓慢;该缓冲材料受到压缩后,孔隙收缩且形状发生较多的变化,即该材料的开放结构能够吸收一定外部能量。
In this paper, the microstructure and the infrared spectrum of the cushioning material were used to verify the existence of the network cross-linked structure. On this basis, static compression test, creep test and four-time compression test Bomb test to determine the mechanical properties of the material. The experimental results show that the residual strain of the cushioning material increases with the increase of puffing ratio, and the rebound thickness decreases with the increase of puffing ratio. The creep value of the cushioning material increases rapidly in the early stage and changes little later Linear trend. After 24 h of unloading, the residual strain dropped sharply within half an hour and then gradually became slow. After the cushioning material was compressed, the pore shrinks and the shape changes more, that is, the open structure of the material can absorb some external energy.