Career Program: Shear-Induced Slippage at Polymer-Solid Interfaces

这个职业发展计划将课程开发和指导与简单几何中聚合物流体剪切诱发滑移的基础研究相结合。研究的重点是经典的防滑工况。最近的研究表明，对于聚合物熔体和溶液，甚至对于某些牛顿流体，在足够高的剪切应力下，这一条件可能不成立。该研究使用光学和光谱方法来研究聚合物取向在整体和靠近围壁的空间变化。在纠缠的聚合物溶液中，将研究链长和靠近边界面的聚合物链取向的影响。在聚合物溶液和熔体中，将确定种内混合和应力梯度对小分子迁移和滑移的影响。这种类型的信息在聚合物加工中有应用。该计划的教育部分包括进一步发展两门新课程，聚合物工程和聚合物动力学。这些课程将整合到一个新的多学科本科高分子工程项目中。这是一个战略的一部分，使化学工程项目更适应不断变化的工业需求。该教育计划的一个特色是指导计划，使有才华的本科生接触到工业研究问题。具体计划包括在基础研究方法方面培训有前途的代表性不足的少数民族学生。该计划包括努力提高这类学生的毕业率和研究生入学率。

9624254 Archer This career development program combines course development and mentoring with fundamental studies of shear-induced slippage of polymeric fluids in simple geometry's. The research focuses on the classic no-slip condition. Recent studies indicate this condition may not be valid at sufficiently high shear stresses for polymer melts and solutions and even for some Newtonian fluids. The research uses optical and spectroscopic methods to study spatial variations in polymer orientation in the bulk and close to confining walls. The effects of chain length and polymer strand orientation close to bounding surfaces will be studied in entangled polymer solutions. In polymer solutions and melts, the influence of inner-species mixing and stress gradients on small molecule migration and slip will be determined. Information of this type has application in polymer processing. The educational component of this program includes further development of two new courses, Polymer Engineering and Polymer Dynamics. These courses will be integrated into a new multi-disciplinary undergraduate polymer engineering program. This is part of a strategy to make the chemical engineering program more responsive to changing industrial needs. A special feature of the educational plan is a mentoring program whereby talented undergraduates are exposed to industrial research problems. Specific plans are included for training promising underrepresented minority students in basic research methodology. This plan includes efforts to improve graduation rates and post graduate enrollment rates for this group of students.