Studies of Asymmetric Membrane Formation

这是一项通过相反转技术研究聚合物膜形成的研究，将重点放在描述结构形成过程的定量模型的发展上。许多模型聚合物/溶剂/非溶剂系统将用于研究玻璃化转变，液-液相分离和结晶在膜沉淀之前和之后的作用。薄膜形态也将使用扫描电子显微镜进行研究。结合传质实验的结果，这些结果将根据为非溶剂-溶剂交换过程开发的模型进行分析。这些研究结果将直接应用于膜处理领域，并将在涉及聚合物相的许多其他重要技术过程中得到应用非平衡淬火条件下的相变。

This is a study of polymer membrane formation by the phase inversion technique to which will focus on the development of quantitative models to describe the structure forming processes. A number of model polymer/solvent/nonsolvent systems will be used to investigate the role of glass transition,liquid-liquid phase separation, and crystallization prior to and following film precipitation. Film morphology will also be studied using scanning electron microscopy. Together with results from the mass transfer experiments, these will be analyzed in terms of models developed for the nonsolvent-solvent exchange process. Results from these studies will have direct application in the field of membrane processing and will also find application in a number of other important technological processes which involve polymer phase transformation under nonequilibrium quench conditions.