GOALI: Pulverization and Agglomeration Polymeric Materials Using High Shear and Normal Forces

摘要CTS- 9629650 H.阿拉斯图普尔和B。伯恩斯坦，伊利诺伊理工学院 结合实验和计算研究进行理解的基本机制，在粉碎过程中的聚合物材料的挤出。将材料输送到挤出机，在挤出机中加热它们以形成聚合物材料的连续膜，然后冷却并以固态暴露于高剪切力和压缩力，并通过诱导应力的快速松弛。 这导致粉碎。 材料可以是热塑性塑料、热固性塑料和弹性体。 实验将使用盘形样品模拟粉碎和最终团聚之前的应力状态及其演变。 有限元方法将被应用于模拟变形，包括边界滑移、材料断裂、摩擦、烧结和团聚。 这是与Amoco和W.R.合作的GOALI（学术与工业互动的资助机会）项目。格雷斯公司的工业合作伙伴将参与并提供反馈的研究工作。 预计这项研究将导致一个建模框架，包括粉碎过程的控制参数，粉碎，团聚和放大的标准。 粉碎过程与制造过程、聚合物回收、纺织工业和管道涂层相关。 ***

Abstract CTS- 9629650 H. Arastoopour and B. Bernstein, Illinois Institute of Technology A combined experimental and computational study is undertaken to understand the basic mechanisms in the pulverization process of polymeric materials by extrusion. The materials are conveyed to an extruder where they are heated to form a continuous film of polymeric materials, followed by cooling and exposure in solid state to high shear and compressive forces, and by rapid relaxation of the induced stresses. This results in pulverization. The materials may be thermoplastics, thermosetting and elastomers. The experiments will use disk-shaped samples to model the stress state and its evolution before pulverization and eventual agglomeration. Finite element method will be applied to simulate the deformations, including boundary slip, material fracture, friction, sintering, and agglomeration. This is a GOALI (Grant Opportunity for Academic Interaction with Industry) project in collaboration with Amoco and W.R. Grace Co. The industrial partners will participate and provide feedback to the research work. It is expected that the study will lead to a modeling framework, including the controlling parameters of the pulverization process, and criteria of pulverization, agglomeration, and scale-up. The pulverization process has relevance to manufacturing processes, polymer recycling, textile industry, and pipe coating. ***