Enhanced Polymer Properties Through Controlled Melt Manipulation During Processing

通过加工过程中的受控熔体操作增强聚合物性能

• 批准号: 0218182
• 负责人: John Coulter
• 金额: $ 36万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0218182&HistoricalAwards=false
• 关键词: Enhanced; Polymer; Properties; Through; Controlled

An interdisciplinary research team at Lehigh University is exploring melt manipulation during polymer processing. Melt manipulation is promising for the manufacturing of polymer-based products with enhanced properties. Because property enhancements can be realized the expanded usage of recycled materials also becomes possible. During melt manipulation, an otherwise conventional molding cycle is augmented by the application of oscillatory mechanical energy to the polymer melt during processing. This affects the material orientation and relaxation dynamics that occur during processing and in-turn the internal structure and overall properties of the final product. The project is focused on learning how, when, and where to apply the technique to yield beneficial results. The detailed sequential cause and effect relationships that connect applied melt manipulation conditions to final product quality attributes are being explored using a coupled experimental and analytical approach. Components of the study are focusing on relationships between 1) applied machine processing conditions and localized processing conditions throughout the mold, 2) localized processing conditions and molecular orientation, 3) local molecular orientation and localized material response, and 4) localized material response and overall product performance. To assure the relevance and success of the effort, significant industrial involvement and guidance is included. The broad educational impact of the program is being enhanced by the inclusion of undergraduate students from a number of schools. In addition, a target group of middle school students from an under-represented minority population are being exposed to the research as part of an established and award winning cooperative education program.

里哈伊大学的一个跨学科研究小组正在探索聚合物加工过程中的熔体操纵。 熔体操控对于制造具有增强性能的聚合物产品很有前景。 由于可以实现性能增强，因此回收材料的扩大使用也成为可能。 在熔体操纵过程中，通过在加工过程中向聚合物熔体施加振荡机械能来增强传统的成型周期。 这会影响加工过程中发生的材料取向和松弛动力学，进而影响最终产品的内部结构和整体性能。 该项目的重点是学习如何、何时、何地应用该技术来产生有益的结果。 正在使用耦合实验和分析方法来探索将应用的熔体操作条件与最终产品质量属性联系起来的详细顺序因果关系。 研究的重点是 1) 整个模具中所应用的机器加工条件和局部加工条件之间的关系，2) 局部加工条件和分子取向，3) 局部分子取向和局部材料响应，以及 4) 局部材料响应和整体产品性能。 为了确保这项工作的相关性和成功，需要大量的工业参与和指导。 该计划的广泛教育影响因来自多所学校的本科生的加入而得到增强。 此外，作为既定且屡获殊荣的合作教育计划的一部分，来自代表性不足的少数族裔的中学生目标群体正在接触这项研究。