Stress Chromic Polymeric Coatings for Visual Detection of Overstress Conditions

用于视觉检测过应力情况的应力铬聚合物涂层

• 批准号: 9713954
• 负责人: Robert Mullen
• 金额: $ 25.5万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-10-01 至 2001-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9713954&HistoricalAwards=false
• 关键词: Stress; Chromic; Polymeric; Coatings; Visual

9713954 Mullen The objective is to develop a series of liquid crystalline (LC) stress chromic coatings for rapid identification of over-stress conditions in the components of the infrastructure, such as highway bridges. These coatings change color when subjected to stress/strain. The material can be formulated to return to the original color once the stress/strain is removed, or the color change can remain for weeks. Diacetylene liquid crystalline polymers are the materials of choice because of their stress chromic properties. The development of this coating will allow the easy visual detection of stress levels in a material and allow a more accurate identification of flaws (cracks) in structures. Early detection should reduce the cost of maintenance and repair and ensure safe structures. ***

9713954马伦的目标是开发一系列液晶（LC）应力变色涂层，用于快速识别基础设施（如公路桥梁）组件中的过应力条件。 这些涂层在受到应力/应变时会改变颜色。 该材料可以配制成一旦应力/应变被移除就返回到原始颜色，或者颜色变化可以保持数周。 二乙炔类液晶聚合物由于其应力变色特性而成为首选材料。 这种涂层的开发将使材料中的应力水平易于视觉检测，并允许更准确地识别结构中的缺陷（裂缝）。 及早发现应能减少维护和修理费用，确保结构安全。 ***