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UV and Emission Studies of Cure, Water and Oxidation/Degradation in Polymers

机译:聚合物中固化,水和氧化/降解的紫外和辐射研究

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This talk will review our recent and current research on using intrinsic andextrinsic sensors to characterize cure reactions, water-uptake and oxidation/degradation in polymers and composites. Extrinsic chromophores mimicking curing agents were used to model and monitor cure reactions in diamine cured epoxy, polyimide, polyurethanes and polyamides, by UV and fluorescence techniques. Intrinsic fluorescence behavior of some curing agents also provided sensitive cure monitoring in diamine cured epoxy. Both extrinsic and intrinsic sensors have also been used for water-uptake monitoring in cured epoxy. Small amounts of oxidation or degradation in polymers can be detected with a high sensitivity by fluorescence. UV reflection technique can be used to monitor cure reactions in polymers having negligible fluorescence. By using fiber-optic fluorescence or UV instrument in-situ monitoring of cure processing has been demonstrated for extrinsic and intrinsic sensors. UV, Intrinsic and Extrinsic Fluorescence, Cure, Reaction, Water-Uptake, Oxidation/Degradation Fiber-Optic Fluorimeter, Composites.

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