Rheology of Complex Fluids in Equibiaxial Elongational Flows

1236576金星复杂流体的流动是无处不在的，可以在自然界和现代制造技术中找到。 合成聚合物、生物流体和食品是复杂流体的常见例子，它们表现出流变或流动行为，难以通过实验测量和理论预测。 采用一种新的流变学技术--连续润滑挤压流（CLSF）研究了聚合物液体在等双轴拉伸流动中的流变行为。 这项研究允许迄今无法建立的结构-性能关系，这将是非常宝贵的聚合物化学家和工艺工程师，以及理论家在他们的努力，以开发聚合物动力学的分子模型。 对聚合物流动行为的更好理解将导致更有效的能源和材料利用以及先进加工方法的发展。 一个外展组件集成了科学调查，涉及教师和学生在数学和科学教育（MSE）在伊利诺伊理工学院的部门复杂的流体教学模块的发展。 MSE部门为芝加哥公立学校的高中教师制定了完善的教育和培训计划。

1236576VenerusFlows of complex fluids are ubiquitous and can be found both in nature and in modern manufacturing technologies. Synthetic polymers, biological fluids and foods are common examples of complex fluids that display rheological, or flow, behavior that is difficult to both measure experimentally and predict theoretically. A novel rheological technique called Continuous Lubricated Squeezing Flow (CLSF) is used to investigate the rheological behavior of polymeric liquids in equibiaxial elongation flows, which involves the stretching of a fluid in two directions. This study allows heretofore unavailable structure-property relations to be established that will be invaluable to polymer chemists and process engineers, as well as to theoreticians in their efforts to develop molecular models for polymer dynamics. An improved understanding of polymer flow behavior will result in more efficient energy and materials utilization and to the development of advanced processing methodologies. An outreach component is integrated with the scientific investigation that involves the development of instructional modules on complex fluids by faculty and students in the Department of Math and Science Education (MSE) at Illinois Institute of Technology. The MSE Department has well-established education and training programs for high-school teachers in the Chicago Public Schools.