Semiempirical relationships between properties and loading in filled elastomers
Semiempirical relationships between properties and loading in filled elastomers
复制标题
填充弹性体的性能和负载之间的半经验关系
DOI：
--
复制
发表时间：
1989
期刊：
影响因子：
--
通讯作者：
P. Vondracek
中科院分区：
文献类型：
--
作者：
A. Pouchelon;P. Vondracek
摘要未硫化白炭黑填充硅橡胶的动态储能模量在达到临界填充量时急剧增加。在相同的化合物中观察到电导率的类似行为。实验数据符合渗滤法相当好，和显微镜证实，根据渗滤模型的填料网络的形成。这种行为取决于聚合物-填料相互作用水平，表明由吸附的聚合物桥接在一起的填料颗粒组成的填料网络。发现渗流阈值与相应硫化胶的最佳断裂伸长率值相吻合。本文所述的填充橡胶的逾渗行为和性能之间的关系，在各种填充橡胶的组成相当不同的观察。这似乎表明，在所有的弹性体颗粒填料增强的一般有效性的关系。
Abstract The dynamic storage modulus of uncured silica-filled silicone rubber increases sharply when a critical filler loading is reached. A similar behavior has been observed for the conductivity in the same compounds. The experimental data fit a percolation law fairly well, and microscopy confirms the formation of a filler network according to the percolation model. This behavior depends on a polymer-filler interaction level, suggesting a filler network consisting of filler particles bridged together by adsorbed polymer. It has been found that the percolation threshold coincides with the optimum value of elongation at break of the corresponding vulcanizates. The percolation behavior and the relations between properties of filled rubbers described here were observed in various filled rubbers of quite different compositions. This seems to suggest the general validity of the presented relationships in all elastomers reinforced by particulate fillers.