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

研究增强弹性体的聚合物-填料界面动力学：实验、建模和理论

• 批准号: 67765846
• 负责人: Professor Dr. Manfred Klüppel
• 金额: --
• 依托单位: Max-Planck-Institut für Polymerforschung
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/67765846?language=en
• 关键词: Investigation; polymer; filler; interphase; dynamics

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.

弹性体中增强填料网络的结构和性能受到聚合物-填料界面动力学的强烈影响。尽管填料网络是设计橡胶制品技术性能的主要因素，但到目前为止，这一点尚未完全被理解。湿地牵引力和轮胎磨损。靠近吸附界面的聚合物的行为很大程度上取决于由于固体表面的存在而导致的构型熵损失以及链与填料和本体中其他链的相互作用之间的相互作用。我们将通过实验、理论和数值方法对此进行详细分析。特别强调的是更好地理解影响填料絮凝的微观机制以及高温下填料-填料键的动力学。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，代表特定的填料-聚合物-填料界面，玻璃化转变温度显着升高。通过参考微观和介观尺度上的相间动力学，将在广泛的温度和频率尺度上描述填充弹性体的线性和非线性粘弹性能。