Effect of the Interactions between Polymers and Solid Fillers on the Structure of Polymer-Filler

聚合物与固体填料之间的相互作用对聚合物-填料结构的影响

• 批准号: 67049259
• 负责人: Professor Dr. Gert Heinrich
• 金额: --
• 依托单位: Leibniz-Institut für Polymerforschung Dresden (IPF)
• 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 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/67049259?language=en
• 关键词: Effect; Interactions; between; Polymers; Solid

As a conclusive stage of the first project period that logically extends its findings, the currently proposed project aims at gaining fundamental, comprehensive understanding of the effects of the interaction of polymers with solid fillers on the structure of the filler-polymer interfaces, polymer mediated forces, filler agglomeration and associated rheological properties of the filled polymer melts. Relying on the proposed theoretical development, we intend to calculate the polymer mediated force acting between fillers as a function of the filler separation, polymer density, affinity of the filler surface for the adsorbed polymers, and the degree of polymerization of polymers. In addition, we will investigate the density structure of the adsorbed polymer layers depending on the micoscopic interactions between the filler surface and polymers. We will use the Density-of-state Monte Carlo simulations to calculate the polymer mediated force and the structure of the adsorbed polymer layers with the objective to verify our theoretical findings. Using the calculated polymer-mediated interactions as an input, we will obtain the equation of state of the polymer-particle composite in the presence of the adsorption interactions between the fillers and polymers. In addition, we intend to investigate the polymer-induced phase separation in the particle-colloid composites and use the result in explaining the polymer bridging-assisted filler aggregation in the polymer particle mixtures. In the proposed theoretical approach, we will separately describe the cases of reversible and irreversible polymer bridging among fillers. For the case of irreversible bridging by polymers, we will investigate the 'bridging flocculation' of the fillers in the polymer melts and the formation of filler cluster aggregates (flocs) based on the exact statistical physical model. This study includes investigating the polymer-mediated interactions among flocs and their effect on the shear viscosity of the filled polymer melt. In the final stage of the proposed project, we will study the selected rheological properties of filled melts starting from microscopic polymer-filler and resulting polymer-mediated filler-filler interactions, through developing and making use of the self-consistent dynamic model incorporating those interactions.

作为在逻辑上扩展其发现的第一个项目时期的一个结论阶段，目前提出的项目旨在获得基本的，全面的理解，以了解聚合物与固体填充剂对填充 - 聚合物界面，聚合物介导的力，填充剂凝聚，填充物和相关的填充聚合物的介质性质的相互作用的影响。依赖于提出的理论发展，我们打算计算填料之间作用的聚合物介导的力，这是填充物分离的函数，聚合物密度，填充表面对吸附聚合物的亲和力以及聚合物的聚合度的程度。此外，我们将根据填充表面和聚合物之间的造影相互作用来研究吸附聚合物层的密度结构。我们将使用状态蒙特卡洛模拟密度来计算聚合物介导的力和吸附聚合物层的结构，以验证我们的理论发现。使用计算出的聚合物介导的相互作用作为输入，我们将在填充剂和聚合物之间存在吸附相互作用的情况下获得聚合物粒子复合材料的状态方程。此外，我们打算研究颗粒胶体复合材料中聚合物诱导的相分离，并使用结果来解释聚合物颗粒混合物中聚合物桥接辅助填充物的聚集。在提出的理论方法中，我们将分别描述填充物之间可逆和不可逆的聚合物桥接的情况。对于聚合物不可逆的桥接的情况，我们将根据精确的统计物理模型研究聚合物熔体中填充剂的“桥接絮凝”和填充簇聚集体（floc）的形成。这项研究包括研究聚合物介导的泡沫之间的相互作用及其对填充聚合物熔体的剪切粘度的影响。在拟议项目的最后阶段，我们将研究从显微镜聚合物填充剂开始的填充熔体的所选流变特性，并通过开发和利用并利用自谐的动态模型来结合这些相互作用，从而产生的聚合物介导的填充物相互作用。