Relationship Between Molecular Interactions and Morphology For Polymers Interacting With Compressed Fluid Mixtures.

聚合物与压缩流体混合物相互作用的分子相互作用和形态之间的关系。

• 批准号: 9218769
• 负责人: Keith Johnston
• 金额: $ 21.29万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9218769&HistoricalAwards=false
• 关键词: Relationship; Between; Molecular; Interactions; Morphology

The objective of this project is to understand how compressed fluids influence polymer morphology based on molecular interactions and phase behavior. Many different polymers can be prepared into various physical forms through a variety of processes using compressed or supercritical fluids. Structures include microspheres, fibers, and foams as well as more unusual forms. Theoretical and experimental thermodynamic studies are planned to examine polymer morphologies and processes with compressed fluids. One part of the project involves determining the effect of CO2 on glass transition temperature with supercritical fluid chromatography. A prediction of retrograde vitrification of glassy polymer, based on lattice fluid theory and the Gibbs- DiMarzio criterion for CO2 sorption and Tg, will be tested. Polymers are versatile materials which are widely utilized in many commercial products. New physical forms can improve performance and quality in existing applications or create new uses. Applications anticipated for these materials range from new polymeric membranes and chromatographic packings for separations to lightweight structural components or even a matrix for artificial skin.***//

这个项目的目标是了解压缩流体如何基于分子相互作用和相行为影响聚合物的形态。许多不同的聚合物可以通过使用压缩或超临界流体的各种工艺制备成不同的物理形式。结构包括微球、纤维和泡沫以及更不寻常的形式。计划进行理论和实验热力学研究，以检验聚合物的形态和压缩流体的过程。该项目的一部分涉及用超临界流体色谱仪确定二氧化碳对玻璃化转变温度的影响。基于晶格流体理论和Gibbs-DiMarzio二氧化碳吸附和玻璃化转变温度的Gibbs-DiMarzio判据，将检验玻璃聚合物的逆玻璃化预测。聚合物是一种用途广泛的材料，广泛应用于许多商业产品中。新的物理形式可以提高现有应用程序的性能和质量，或创造新的用途。这些材料的预期应用范围从用于分离的新型聚合物膜和色层填料，到轻质结构组件，甚至是用于人造皮肤的基质。