Microscopic Observation of Aging of Silica Particles in Unvulcanized Rubber
Microscopic Observation of Aging of Silica Particles in Unvulcanized Rubber
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DOI：
10.1021/ma102095b
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发表时间：
2010-10
期刊：
影响因子：
5.5
通讯作者：
Y. Shinohara;H. Kishimoto;N. Yagi;Y. Amemiya
中科院分区：
文献类型：
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作者：
Y. Shinohara;H. Kishimoto;N. Yagi;Y. Amemiya
用X射线光子相关谱（XPCS）研究了未硫化橡胶中二氧化硅粒子的动力学。结果显示了粒子动力学的老化行为，随着老化时间的增加，粒子的动力学变慢。这种减慢并不伴随着微米和亚微米尺寸尺度的聚集体的配置的变化。老化行为取决于硅烷偶联剂的类型和二氧化硅粒子的体积分数，但它不是源于硫化。这项研究表明，复杂的微观流变现象发生，即使在工业产品。这些微观流变现象和宏观粘弹性之间的关系是一个悬而未决的问题。
The dynamics of silica particles in unvulcanized rubber is investigated by X-ray photon correlation spectroscopy (XPCS). The results show the aging behavior of the dynamics; the dynamics of particles slows down as the aging time increases. This slowing down is not accompanied by a change in the configuration of aggregates in size scales of micrometers and sub-micrometers. The aging behavior depends on the type of silane coupling agent and the volume fraction of silica particles, while it does not originate from vulcanization. This study shows that complex microrheological phenomena occur even in industrial products. The relationship between these microrheological phenomena and macroscopic viscoelasticity is an open question.