{"id":3262,"date":"2015-10-22T11:39:06","date_gmt":"2015-10-22T17:39:06","guid":{"rendered":"https:\/\/www.ulprospector.com\/knowledge\/?p=3262"},"modified":"2018-02-09T14:17:32","modified_gmt":"2018-02-09T20:17:32","slug":"pe-the-problem-of-confounded-mechanisms-in-accelerated-testing-protocols-presented-by-michael-sepe","status":"publish","type":"post","link":"https:\/\/ulprospector.ul.com\/3262\/pe-the-problem-of-confounded-mechanisms-in-accelerated-testing-protocols-presented-by-michael-sepe\/","title":{"rendered":"The Problem of Confounded Mechanisms in Accelerated Testing Protocols – Presented by Michael Sepe"},"content":{"rendered":"

\"\"<\/strong>Recorded Tuesday, November 17 at 11AM EDT – <\/em>Presented by MIchael Sepe
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Accelerated testing protocols have been part of the product and material qualification and validation process for a long time. The rate of mechanisms such as oxidative degradation is accelerated by employing higher temperatures and then creating a model that relates the results of a relatively short exposure time at these higher temperatures to an equivalent degree of change in performance that may occur at a lower temperature over a longer period of time.<\/p>\n

The implicit assumption in these protocols is that the property changes caused by these accelerated exposure routines are solely due to the mechanism that is the focus of the test when in fact these changes can be created by multiple mechanisms that produce a compound effect that is never deconvoluted. This presentation outlines some of these potential interferences, illustrates the problems that can result in attempting to model long-term behavior based on short-term responses, and proposes some possible solutions to these problems.<\/p>\n

\u00a0Download the Slides<\/a><\/h4>\n