Abstract Whereas size reduction that accompanies new technologies calls for more complex and more constrained shapes for foams to be used as seals, ribbons or surface coatings, little is known about the mechanics of foam systems characterized by a potentially small number of pores across their thickness and possessing parietal or free surface pore layers. Elastic stiffness and rupture stress have been measured for open-cell foam ribbons produced thanks to a method allowing to tune finely and independently several crucial parameters: ribbon thickness, pore size and solid volume fraction. Results reveal that the longitudinal elastic stiffness of foam ribbons increases significantly as the number of pores across the ribbon thickness decreases within the range 1–10. This increase is understood through the contribution of the parietal layers with respect to the bulk layers. Similarly, rupture stress of foam ribbons characterized by narrow pore size distributions increases as a function of the ratio pore size/ribbon thickness. All others things being equal, the rupture stress is smaller for polydisperse samples compared to monodisperse samples.

中文翻译：

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聚合物泡沫带的拉伸力学

摘要 尽管伴随新技术而来的尺寸减小要求将泡沫用作密封件、条带或表面涂层的更复杂和更受限制的形状，但对泡沫系统的力学知之甚少，其特征在于其厚度和厚度方向上可能存在少量孔。具有壁层或自由表面孔隙层。由于采用了一种方法可以对几个关键参数进行精细和独立的调整：带厚度、孔径和固体体积分数，因此已经测量了生产的开孔泡沫带的弹性刚度和断裂应力。结果表明，泡沫带的纵向弹性刚度随着带厚度上的孔数在 1-10 范围内减少而显着增加。这种增加是通过壁层相对于体层的贡献来理解的。类似地，以窄孔径分布为特征的泡沫带的破裂应力作为孔径/带厚度比的函数而增加。在所有其他条件相同的情况下，与单分散样品相比，多分散样品的破裂应力更小。