The OIT Procedure Proxy of Lifetime at Accelerated Oxidation

The OIT Procedure Proxy of Lifetime at Accelerated Oxidation Three more procedures to study durability of boards were introduced in the company. One procedure was dealing with heating a sample of composite material in pure oxygen at a high temperature (typically 190°C) and measuring the time span before the sample is progressively oxidized. ASTM D3895 was used as a prototype however, it could 

For example, a typical GeoDeck composite profile made pre-October 2003 showed a lifetime (pure oxygen, 190°C) equal to 0.15-0.30 min. For the simplicity and following the above ASTM procedure, we will call this lifetime OIT. The first level material (see above) showed the respective OIT equal to 1.5-3 min, which is about 10 times higher. The second level GeoDeck (since December 2003, see above) showed OIT 4-5 min and then fluctuated but consistently increased in the range of 6 to 10 min between September and December 2004. In December 2004, the third level of antioxidants was employed, and the OIT reached 12-16 min. 

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