Evaluation of Polymer Degradation Using Chemiluminescence Imaging

本项目将调查横向变化， 聚合物自氧化反应机理 第一步是 化学发光（甚低强度光发射）成像 几种聚合物在稳态、自催化 和自氧化的氧限制阶段。 其它横向 将使用解析分析技术将聚合物 归因于机械异质性。 短紫外线 辐照将用于激发聚合物 化学发光 松弛的横向变化 受激化学发光达到稳态强度将是 考察 横向分辨测量的能力 将产生玻璃-凝胶转变温度。 的 使用的分析方法将与聚合物老化有关， 用于开发聚合物失效预测模型。 一种潜在的新工具， 将提供非破坏性的现场测试， 聚合物材料的使用寿命。

This project will investigate lateral variation in the polymer autoxidation reaction mechanism. The first step is a chemiluminescence (very low intensity light emission) imaging survey of several polymers in the steady state, autocatalytic and oxygen limited stages of autoxidation. Other laterally resolved analytical techniques will be used to relate polymer attributes to the mechanistic heterogeneity. Brief ultraviolet irradiation will be used to stimulate polymer chemiluminescence. Lateral variations in relaxation of the stimulated chemiluminescence to steady state intensity will be examined. The capability for laterally resolved measurement of the glass-to-gel transition temperature will be developed. The analytical methods used will be related to polymer aging and used to develop polymer failure prediction models. A potential new instrument resulting from the research would provide non-destructive field testing to predict useful service life of polymeric materials.