Role of Interfacial Instabilities in Multilayer Coextrusion of Polymeric Liquids

界面不稳定性在聚合物液体多层共挤出中的作用

• 批准号: 9304035
• 负责人: Bamin Khomami
• 金额: $ 27.95万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-15 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304035&HistoricalAwards=false
• 关键词: Role; Interfacial; Instabilities; Multilayer; Coextrusion

9304035 Khomami An investigation is to be carried out on the interfacial stability and dynamic deformation of multilayer polymeric fluids subjected to shear and extensional deformation. The approach is a mix of modeling and experiments. The modeling component consists of theoretical stability analysis, including three dimensional and finite amplitude instability modes. The experiments will use various polymer melts in straight and converging channels to simulate a co-extrusion environment. Theoretical and experimental findings regarding layer deformation and stability will be compared. Multilayer coextrusion and coating is an important process in the formation of polymeric composite materials. Under certain processing conditions, instabilities can arise, and these cannot at present be reliably predicted. ***

9304035霍马米 研究了多层聚合物流体在剪切和拉伸变形下的界面稳定性和动态变形。该方法是建模和实验的混合。建模部分包括理论稳定性分析，包括三维和有限振幅不稳定模式。实验将使用各种聚合物熔体在直和收敛的通道，以模拟共挤出环境。将比较关于层变形和稳定性的理论和实验结果。 多层共挤包覆是聚合物复合材料成型的重要工艺。在某些加工条件下，可能出现不稳定性，目前还不能可靠地预测。 ***