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

这个项目的目的是了解如何压缩 流体影响聚合物形态的分子基础 相互作用和相行为。 许多不同的聚合物可以 通过各种方法制备成各种物理形式， 使用压缩或超临界流体的工艺。 结构包括微球、纤维和泡沫， 更不寻常的形式。 理论和实验 热力学研究计划检查聚合物 压缩流体的形态和过程。 一部分 该项目的一部分是确定二氧化碳对玻璃的影响， 超临界流体转变温度 层析 玻璃化的预测 玻璃态聚合物，基于晶格流体理论和吉布斯- 将测试二氧化碳吸附和Tg的DiMarzio标准。 聚合物是广泛应用于制造业的通用材料。 许多商业产品。 新的物理形式可以改善 在现有应用程序中提高性能和质量，或创建新的 使用. 这些材料的预期应用范围从 新型聚合物膜和色谱填料 分离到轻型结构部件，甚至 人造皮肤基质 *//

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.***//