Role of Extensional Stresses on the Interfacial Stability of Multiphase Flow Processes

拉伸应力对多相流过程界面稳定性的作用

• 批准号: 8914354
• 负责人: Bamin Khomami
• 金额: $ 27.2万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8914354&HistoricalAwards=false
• 关键词: Role; Extensional; Stresses; Interfacial; Stability; Role; Extensional; Stresses; Interfacial; Stability

A primarily experimental research program will be carried out on the existence and growth of interfacial instabilities which can occur in the coextrusion of polymer melts. Dies equipped with pressure transducers and optical windows will be used to determine interface deformation and wall stresses in the coextrusion of various combinations of resins. Required rheological characterizations will also be carried out. A theoretical stability analysis will complement the experiments. The instabilities to be investigated are detrimental to the processing of multilayer films or fibers through coextrusion. Their understanding and control is of great importance in materials processing.

将对聚合物融化的界面不稳定性的存在和生长进行主要的实验研究计划。 配备压力传感器的模具和光窗口将用于确定界面变形和树脂各种组合的共截止中的壁应力。 还将进行所需的流变特征。 理论稳定性分析将补充实验。 要研究的不稳定性不利于通过共扎体处理多层膜或纤维。 他们的理解和控制在材料处理中非常重要。