Investigation polymer-filler interphase dynamics of reinforced elastomers: experiments, modelling and theory

弹性体中填料网络的结构和性能受聚合物-填料界面动力学的强烈影响。到目前为止，这一点还没有完全理解，尽管填料网络是设计橡胶制品技术性能的主要因素，例如轮胎的湿牵引力和磨损。靠近吸附界面的聚合物的行为在很大程度上取决于固体表面存在导致的构型熵损失与链与填料和本体中其他链的相互作用之间的相互作用。这将通过实验，理论和数值方法进行详细分析。特别强调的是在更好地理解影响填料絮凝和填料-填料键在高温下的动力学的微观机制。在中等温度下，这些键由相邻填料颗粒之间的玻璃状聚合物桥组成，代表具有显著增加的玻璃化转变温度的特定填料-聚合物-填料界面。通过参考微观和介观尺度上的相间动力学，填充弹性体的线性和非线性粘弹性性质将在宽的温度和频率范围内描述。

Structure and properties of reinforced filler networks in elastomers are strongly influenced by the polymer-filler interphase dynamics. So far this is not fully understood though filler networking is the main factor for designing technical properties of rubber goods, e.g. wet traction and wear of tires. The behavior of the polymers close to adsorbing interface is largely determined by the interplay between the loss of configuration entropy due to presence of the solid surface and interactions of the chain with the filler and other chains in the bulk. This will be analyzed in detail by experimental, theoretical and numerical methods. Special emphasize lies in a better understanding of the microscopic mechanisms affecting filler flocculation and the dynamics of filler-filler bonds at elevated temperature. At moderate temperature, these bonds consist of glassy-like polymer bridges between adjacent filler particles representing a specific filler-polymer-filler interphase with significantly increased glass transition temperature. By referring to the interphase dynamics on a micro- and mesoscale, the linear and non-linear viscoelastic properties of filled elastomers will be described on a broad temperature- and frequency scale.