Optical Determination of the Full Stress Tensor in Sheared Polymer Fluids

在一项研究启动奖下，将探索一种新的双折射技术来表征聚合物流体的性质。特别是，将获得更准确和可靠的测量全应力张量，包括第二个法向应力差。该技术将应用于纠缠线性聚合物溶液中的几种现象，例如振荡剪切。聚合物流体及其表征在广泛的材料加工技术中发挥着重要作用。通过更好的材料表征，可以更确定地预测最佳加工条件。

Under a Research Initiation Award, a novel birefringence technique will be explored for characterizing the properties of polymeric fluids. In particular, more accurate and reliable measurements will be obtained for the full stress tensor, including the second normal stress difference. The technique will be applied to several phenomena in entangled linear polymer solutions, such as for example oscillatory shear. Polymeric fluids, and their characterization, play an important role in a very broad range of materials processing techniques. Optimal processing conditions would be predictable with greater certainty with better materials characterization.