Experimental and Computational Analysis of Shear-Flow Anomalies for Nearly Monodisperse Polymer Melts and Solutions

9303112莫里森 将进行实验和理论相结合的研究，解决聚合物材料加工中的熔体破裂问题。一组实验与单分散聚丁二烯和聚苯乙烯将进行各种剪切流。结果将进行比较，现有的和新的计算各种本构方程预测粘弹性不稳定性。研究人员希望建立一个明确的熔体破裂的本构解释。 如果研究人员成功地建立了这样一个迄今为止模棱两可和有争议的现象的解释，它将打开大门，以消除在聚合物材料的加工过程中熔体破裂的故障。 ***

9303112 Morrison A combined experimental and theoretical investigation will be carried out addressing the issue of melt fracture in the processing of polymeric materials. A set of experiments with monodispersive polybutadine and polystyrene will be conducted in various shear flows. The results will be compared to existing and new calculations on a variety of constitutive equations which predict viscoelastic instabilities. The investigators hope to establish an unambiguous constitutive explanation of melt fracture. If the investigators succeed in establishing such an interpretation of a so far ambiguous and controversial phenomenaon, it will open the door to eliminating failures from melt fracture in the processing of polymeric materials. ***