Limiting oxygen index: Difference between revisions

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Revision as of 21:59, 19 April 2010

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The '''limiting oxygen index (LOI)''' is the minimum concentration of [[oxygen]], expressed as a percentage, that will support [[combustion]] of a [[polymer]]. It is measured by passing a mixture of oxygen and [[nitrogen]] over a burning specimen, and reducing the oxygen level until a critical level is reached. <ref>Definition taken from Principles of Polymer Engineering (2nd edition) by N.G. McCrum , C.P. Buckley, and C.B. Bucknall</ref>

LOI values for different plastics are determined by standardized tests, such as the ISO 4589 and ASTM D2863 (which are technically equivalent).<ref>[http://www.makeitfrom.com/info/?about=Limiting_Oxygen_Index Limiting Oxygen Index] - retrieved April 19, 2010.</ref>

==See also==