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该文研究了填充亲有机质层状硅酸盐(OLS)的氢化丁腈橡胶(HNBR)之形态学和动态力学性能。由透射电子显微镜(TEM)、小角X射线散射(SAXS)和动态力学分析(DMA)获得的结果,提出了剥离的硅酸盐层构成了局部填料-填料网络状团簇的概念,特别在高剪切力下加工,该网络会出现各向异性构造。变形小时的长径比由于这些团簇的取向而增大。这与从对这些材料所观察到的高补强作用是一致的。例如,填充5份OLS的试样与未填充对比试样相比,拉伸试验测得的50%伸长时的应力可增大33%。研究人员估算了填料结构周遭固定不动的聚合物物层的活化能,发现其因空间方向而异(活化能值介于3.4~4kJ/mol之间)。因此,可以用DMA分析作为估计填料结构取向效应的辅助方法。不仅如此,用SAXS在三个空间方向进行测量,根据TEM分析,就能推断出仍存在少量的插层结构。这些结构也是有方向性的。这些结果清楚表明,应考虑插层结构的取向问题。用SAXS来估计其剥离程度时更是如此。
In this paper, the morphology and dynamic mechanical properties of hydrogenated nitrile rubber (HNBR) filled with organophilic phyllosilicate (OLS) were investigated. The results obtained with Transmission Electron Microscopy (TEM), Small Angle X-Ray Scattering (SAXS) and Dynamic Mechanical Analysis (DMA) suggest that the exfoliated silicate layer constitutes the concept of a partial filler-filler network-like cluster, Shear processing, the network will appear anisotropic structure. The aspect ratio at deformation hours is increased due to the orientation of these clusters. This is consistent with the high reinforcing effect observed for these materials. For example, a specimen filled with 5 parts of OLS can have a 33% increase in stress at 50% elongation as measured by a tensile test as compared to a non-filled control specimen. The researchers estimated the activation energy of the immobilized polymer layer around the packing structure and found that it varies depending on the spatial orientation (activation energy between 3.4 and 4 kJ / mol). Therefore, DMA analysis can be used as an aid in estimating the orientation effect of the packing structure. Not only that, but with SAXS measurements in three spatial directions, TEM analyzes suggest that there is still a small amount of intercalation. These structures are also directional. These results clearly show that the orientation of the intercalated structure should be considered. This is especially true when using SAXS to estimate the extent of their peeling.