SEDL / STP / STP1326-EB / STP13820S

Comparative Techniques for Oxidative Induction Time (OIT) Testing

Cassel, RB
Senior Scientists, The Perkin-Elmer Corporation, Wilton, CT

Salamon, AW
Senior Scientists, The Perkin-Elmer Corporation, Wilton, CT

Curran, G
Senior Scientists, The Perkin-Elmer Corporation, Wilton, CT

Riga, AT
Senior Scientist, The Lubrizol Corporation, Wickliffe, OH

Pages: 8    Published: Jan 1997

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Abstract

The oxidative induction time (OIT) test has been performed using a range of sample materials, instruments and conditions. Using the method of the ASTM E37.01.10 Task Group Interlaboratory Study as a basis, test samples of motor oil and high density polyethylene are analyzed using several analytical options. Instrumentation includes power compensation differential scanning calorimeter (DSC), pressurized cell power compensation DSC and heat flux DSC. The use of vented capsules as an alternative to the standard open capsules is also investigated.

The results show in the case of high density polyethylene (HDPE) (the primary sample studied for this contribution) that statistically similar results were obtained using power compensation DSC and heat flux DSC, and using three types of sample pans, one of which was a side-vented autosampler-compatible pan.