GOALI: Modeling the Polymer Microstructure in the High-Speed Fiber Spinning Process

目标：高速纤维纺丝过程中聚合物微观结构的建模

• 批准号: 9978656
• 负责人: Antony Beris
• 金额: $ 26.14万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-15 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9978656&HistoricalAwards=false
• 关键词: GOALI; Modeling; Polymer; Microstructure; Speed

This Grant Opportunities for Academic Liaison with Industry (GOALI) research project will address the challenges of producing polymer fibers with desired microstructures by investigating the relationship between the processing parameters and the mechanical and physical properties of the fibers. The production of a semicrystalline microstructure is dictated by the processing conditions, such as the take-up speed and the draw ratio in the fiber spinning process. The current understanding of the process/property relationship is mostly empirical, based on experiments and trial and error. This project will address the fundamental complexity by characterizing the internal microstructures as related to the differences in the length and time scales of the process, and will undertake a hierarchical modeling approach based upon the Hamiltonian formalism of non-equilibrium thermodynamics. A coupled micro- and meso-scale modeling scheme based upon the dynamics of the mean chain deformations that are governed by evolution equations obtained using the Hamiltonian approach will be tested against on-line and off-line experimental data obtained from the industry in this University-Industry collaboration. This is expected to lead to better models that allow for an optimization of the high-speed fiber spinning process resulting in superior product quality and a lower processing cost. The industry personnel will take an active role in providing educational experiences for the students as well.

该研究项目将通过研究加工参数与纤维的机械和物理性能之间的关系，解决生产具有所需微观结构的聚合物纤维的挑战。 半结晶微结构的产生取决于加工条件，例如纤维纺丝工艺中的卷绕速度和拉伸比。目前对工艺/性能关系的理解大多是经验性的，基于实验和试错。该项目将通过表征与过程的长度和时间尺度的差异相关的内部微观结构来解决基本的复杂性，并将根据非平衡热力学的Hamilton形式主义进行分层建模方法。 一个耦合的微观和介观尺度的建模方案的基础上的动力学的平均链变形的演化方程，使用哈密顿方法获得的将进行测试，对在线和离线的实验数据从行业中获得的这个大学-工业合作。这有望产生更好的模型，其允许高速纤维纺丝过程的优化，从而导致上级产品质量和更低的加工成本。 行业人员也将积极为学生提供教育经验。