The Kinetics of Extended Chain Crystallization in Polymer Processing

聚合物加工中延长链结晶的动力学

• 批准号: 9301693
• 负责人: David Tree
• 金额: $ 29.19万
• 依托单位: Oklahoma State 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: 1993-11-01 至 1997-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9301693&HistoricalAwards=false
• 关键词: Kinetics; Extended; Chain; Crystallization; Polymer

9301693 Tree Flow-induced crystallization of semi-crystalline polymers to produce extended chain crystals provides an opportunity to produce lightweight, high-strength materials from inexpensive feed stocks by carefully controlling the processing variables. The project will bring together researchers from the fields of polymer processing, thermodynamics and computer simulation to study flow- induced crystallization kinetics. The research will use a specially designed rheometer and a newly developed rheo-optic technique to obtain in-situ, quantitative measurements of flow- induced crystallization kinetics in crystallizable polymers. Anew model of polymer crystallization kinetics, based on current molecular theory for polymer molecules, will be developed and incorporated into a simulation of polymer processing in order to optimize the design of polymer processing operations with respect to the degree of extended chain crystallinity, which in turn is directly related to the mechanical properties of the product. The research may allow the production of high performance plastic parts from inexpensive polymer materials through the careful control of processing variables.

小行星9301693 半结晶聚合物的流动诱导结晶以产生延伸链晶体提供了通过仔细控制加工变量从廉价原料生产轻质、高强度材料的机会。 该项目将汇集来自聚合物加工、热力学和计算机模拟领域的研究人员，研究流动诱导结晶动力学。 这项研究将使用一个专门设计的流变仪和一个新开发的流变光学技术，以获得在可结晶聚合物的流动诱导结晶动力学的原位，定量测量。 一种新的聚合物结晶动力学模型，基于当前的聚合物分子的分子理论，将被开发和纳入到聚合物加工的模拟中，以优化聚合物加工操作的设计，相对于延伸链结晶度的程度，这反过来又直接关系到产品的机械性能。 这项研究可能允许通过仔细控制加工变量，从廉价的聚合物材料生产高性能塑料部件。