Phase Transitions in Polymer Solutions and Gels

[3111764] Bansil聚合物溶液和凝胶的相分离过程在技术上和从基本观点上都是重要的。了解这些过程的动力学对于促进或防止复合材料制造中的相分离是至关重要的。小角光散射和视频显微技术将用于研究聚合物溶液和凝胶中通过spinodal分解和成核机制的相分离过程动力学。通过结合这两种方法，可以从早期到后期探索相分离动力学，也可以确定结构因素和实际空间形态的时间演化。本研究的目的是确定淬火进入两相区域后畴结构的时间演化关系。＊＊＊

9311764 Bansil The processes of phase separation in polymer solutions and gels are of importance both technologically and from a fundamental viewpoint. An understanding of the kinetics of these processes is crucial to either promote or prevent phase separation in the fabrication of composite materials. Small-angle light scattering and video microscopic techniques will be used to study the kinetics of phase separation processes via the mechanisms of spinodal decomposition and nucleation in polymer solutions and gels. By combining these two methods it is possible to explore phase separation kinetics from early to late stages and also to determine the time-evolution of both the structure factor and the real-space morphology. The aim of the proposed study is to determine the relationships characterizing the time evolution of the domain structure following a quench into the two phase region. ***