发泡橡胶的微孔结构对其性能的影响

Influence of Cell Structure on the Properties of Foaming Rubber

研究了发泡橡胶的微孔结构和分布对其力学性能、动态力学性能和摩擦性的影响。结果表明:发泡橡胶中微孔尺寸越大、孔径分布越宽,其拉伸性能越好。发泡橡胶的tanδ峰值随微孔平均面积的增大而增大。发泡橡胶的储能模量随着微孔平均密度的增加而减小,而随着微孔平均面积的增加而增加。温度越低,微孔结构对储能模量的影响越大;随着发泡橡胶微孔平均间隙的增大,摩擦系数随之增大。随着发泡橡胶单位体积内微孔平均个数的增多,摩擦系数减小;干燥路面所受微孔结构的影响要大于湿滑路面。

The influences of microhole structure and distribution in foaming rubber on mechanical properties, dynamic mechanics and frictional characteristics are investigated. The result shows： the larger the size of the microholes and the broader the aperture distribution of the holes in the foaming rubber,the better the tensile property. The peak value of tanδincreases with increasing the average area of the microholes. The storage module decreases with increasing the average density of microholes ,but it increases with increasing the average area of microholes. What＇s more, the lower the temperature, the more effect of the microhole structure on the storage module. At the same time, it can be concluded that the friction coefficient increases with increasing the average spacing between the microholes. Moreover, when the number of the microholes in foam rubber in per volume increases, the coefficient decreases . At last, it is found that the microhole structure has more effect on dry road surface than that on wet road surface.