Experimental Studies of Phase Transitions

相变的实验研究

• 批准号: 9315526
• 负责人: Herman Cummins
• 金额: --
• 依托单位: CUNY City College
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-03-01 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9315526&HistoricalAwards=false
• 关键词: Experimental; Studies; Phase; Transitions

9315526 Cummins Depolarized light scattering is used to investigate dynamical aspects of the glass transition in a number of glass formers, including CKN, salol, ZnCl2 and glycerol. A major objective of the research is to compare the experimental data with the mode coupling theory (MCT) of Professor W. Gotze, Technical University of Munich, a collaborator in the project. The researchers will also carry out dielectric response, neutron scattering, ultrasonic, and high-pressure measurements in collaboration with other groups in an effort to reach a fully integrated picture of the structural relaxation processes in supercooled liquids and to clarify their role in the glass transition. %%% Despite much investigation, the fundamental nature of the molecular structure of a liquid as it supercools to form a rigid glass is not understood. This project will use a number of techniques, particularly light scattering to investigate the glass transition and to use the results to test a recent theory of the glass transition. ***

9315526康明斯去偏振光散射用于研究许多玻璃形成物（包括CKN、salol、ZnCl 2和甘油）中的玻璃化转变的动力学方面。研究的主要目的是将实验数据与W。Gotze，慕尼黑工业大学，该项目的合作者。研究人员还将与其他小组合作进行介电响应，中子散射，超声波和高压测量，以努力实现过冷液体中结构弛豫过程的完全集成图像，并澄清它们在玻璃化转变中的作用。尽管进行了大量的研究，但液体在过冷形成刚性玻璃时分子结构的基本性质仍不清楚。这个项目将使用一些技术，特别是光散射来研究玻璃化转变，并使用结果来测试玻璃化转变的最新理论。***