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.

作为第一个项目周期的结论性阶段，在逻辑上扩展了其研究结果，目前提出的项目旨在获得基本的，全面的理解聚合物与固体填料的相互作用对填料-聚合物界面的结构，聚合物介导的力，填料团聚和相关的填充聚合物熔体的流变性能的影响。依靠所提出的理论发展，我们打算计算作为填料分离，聚合物密度，吸附的聚合物的填料表面的亲和力，和聚合物的聚合度的函数的填料之间的聚合物介导的力。此外，我们将调查的密度结构的吸附聚合物层取决于填料表面和聚合物之间的微观相互作用。我们将使用状态密度蒙特卡罗模拟来计算聚合物介导的力和吸附聚合物层的结构，目的是验证我们的理论研究结果。使用计算的聚合物介导的相互作用作为输入，我们将获得的状态方程的聚合物颗粒复合材料的存在下的填料和聚合物之间的吸附相互作用。此外，我们打算调查的聚合物诱导的相分离的颗粒-胶体复合材料，并使用的结果来解释聚合物桥接辅助填料聚集在聚合物颗粒混合物。在所提出的理论方法中，我们将分别描述填料之间的可逆和不可逆聚合物桥接的情况。对于聚合物的不可逆桥接的情况下，我们将调查的“桥接絮凝”的聚合物熔体中的填料和填料簇聚集体（絮体）的形成基于精确的统计物理模型。本研究包括探讨高分子介导的絮体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。在拟议的项目的最后阶段，我们将研究选定的流变学性质的填充熔体从微观聚合物填料和聚合物介导的填料填料之间的相互作用，通过开发和利用自洽的动态模型，将这些相互作用。