Ellipsometer for aging studies in stable polymer glass

用于稳定聚合物玻璃老化研究的椭圆仪

• 批准号: RTI-2023-00020
• 负责人: Forrest, James
• 金额: $ 3.25万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=762973
• 关键词: Ellipsometer; aging; studies; stable; polymer

This proposal requests funds for the purchase of an ellipsometer for the study of ultrastable polymer glass produced by physical vapour deposition.The most urgent need for the ellipsometer is for aging studies where the time dependence of physical quantities (such as density) is used to monitor the approach to equilibrium of glassy systems.  Such measurements can require days to weeks of continuous measurement- something not possible on facility based instruments.  What makes ultrastable glass, and in particular polymer ultrastable glass, so interesting is that the process of vapour deposition (mediated through enhanced surface mobility) allows for the production of materials that can be very close to equilibrium.  In particular, some polymer glasses have been suggested to be comparable to liquid cooled glass that has been aged for millions of years! Such systems are very promising analogues for extreme aged materials, and as such are good candidates for materials very close to ideal glasses. In addition to the ability to characterize near-ideal glassy systems, such materials have a high density and superior mechanical properties that may be promising in many applications.  HQP using the instrument will become experts in this common nano characterization tool and will learn about important but subtle aspects of model dependent derived (rather than directly measured) quantities. Such HQP have been found to be successful in both the private sector as well as academic career trajectories.

该提案要求资金购买椭圆仪，用于研究通过物理气相沉积生产的超稳定聚合物玻璃。椭圆仪最迫切的需求是用于老化研究，其中使用物理量（例如密度）的时间依赖性来监测这种测量玻璃系统平衡的方法可能需要数天到数周的连续测量——这在基于设施的仪器上是不可能的。是什么使超稳定玻璃，特别是聚合物超稳定玻璃如此有趣的是，气相沉积（通过增强的表面迁移率介导）可以生产非常接近平衡的材料​特别是，一些聚合物玻璃被认为可以与已经老化了数百万年的液体冷却玻璃相媲美！系统是极端老化材料的非常有前途的类似物，因此是非常接近理想玻璃的材料的良好候选者，除了能够表征近乎理想的玻璃系统之外，此类材料还具有高密度和优异的机械性能。 HQP 在许多应用中都有前景。该仪器将成为这种常见纳米表征工具的专家，并将了解模型相关导出（而不是直接测量）数量的重要但微妙的方面，这种 HQP 已被发现在私营部门和学术职业轨迹中都取得了成功。 。