High Temperature Permeation Testing Webinar
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Higher temperature transmission rate testing is increasing in importance for characterizing materials that need to survive elevated temperatures (Solar Panels) or characterizing high barrier samples that would be difficult to measure at lower temperatures. This Webinar will discuss the theory of high barrier testing and show applications for both OTR and WVTR tests with special detail given to a new permeation test cell to aid with WVTR testing
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High Temperature Permeation Testing Webinar
- 1. High Temperature Permeation Testing February 10 th , 2010 2010 Webinar Series Presenter: Joel Fischer MOCON Lab Manager
- 2. High-barrier Materials and High Temperature Applications Flexible Display Solar Panels OLED Cell Phone Screen
- 4. Permeation – How is it measured?
- 7. Permeation basics Permeation rate Transmission rate
- 12. Temperature and Transmission Rate
- 13. MOCON Equipment Temperature Range (10-40C or 5-50C)
- 15. High Temperature WVTR Cell
- 16. Two cells loaded in the oven
- 17. Water trap for “insurance”
- 18. Two cells attached to instrument
- 19. Water Vapor Film Test Aquatran Results
- 20. Water Vapor Film Test Aquatran Results
- 21. Water Vapor Film Test Aquatran Results
- 22. Beware … Film melting temperature Polymer Tg (glass transition temperature)
- 23. Edge Seal Testing Clausen & Dabruzzi (3M) – DOE Solid-State Lighting Manufacturing Workshop, June 24-25 2009
- 26. Please join us for 2 upcoming seminars: Presented in Spanish: “ Package Integrity - How to get started” Wed. February 17 th at 10am CDT Presented in English: “ Shelf Life Studies- Basics,Concepts & Principals ” Wed. March 10th at 10am CDT enroll online at www.mocon.com/events
Notas del editor
- Permeation follows Solution-Diffusion Mechanism. ( read slide) CO2 bottle is a classic example of permeation and loss of CO2 over time
- Many time, customers asked me, “How long do you think the film will reach equilibrium?” The answer is :”There is …” Here are three typical graphs showing different situation: The top one… this is a classical example of a transmission rate graph. This takes the longest, because of out-gassing. Usually conducted to get PSD, or individual zero needed for extreme low TR samples) Lower left one: Classical uptake curve to equilibrium Lower right one: Higher barrier sample out-gassing to equilibrium. Remember that initially there might be absorbed O2 or WV within the sample and we’re setting a gradient through the film. One will note that the typical graphs can be a combination of the out-gassing and uptake graphs (bottom graphs) for moderate transmitters.
- Higher temperatures yield higher transmission rates (almost always). Photos are examples of how a high temp test is set-up (remote diffusion cell, oven and instrument). One can graph data w/ an Arrhenius Plot, which can be used for predicting lower temperature transmission rates. As a “worse case” the data can still be used for comparison purposes between materials. All of this assumes that there are no glass transitions in the material over the range of testing and prediction