Phase Transitions in Polymer Solutions and Gels

聚合物溶液和凝胶中的相变

• 批准号: 9311764
• 负责人: Rama Bansil
• 金额: $ 22.94万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-12-15 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9311764&HistoricalAwards=false
• 关键词: Phase; Transitions; Polymer; Solutions; Gels

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. ***

小行星9311764 聚合物溶液和凝胶中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至关重要。 小角光散射和视频显微技术将用于通过聚合物溶液和凝胶中的旋节分解和成核机制研究相分离过程的动力学。 通过结合这两种方法，可以探索从早期到晚期的相分离动力学，并确定结构因子和实空间形态的时间演变。 所提出的研究的目的是确定表征的域结构的时间演变的关系淬火后的两相区域。 ***