Which test?

Editor’s Note: The following question was posted on the Geosynthetics Facebook page.

Question

Can you please tell me Std-OIT and HP-OIT for a pure unstabilized PP resin?

Answer

The HP-OIT test is preferred for long-term antioxidants that are sensitive to the high temperature of melting in the Std-OIT test. For unstabilized PP and PE, the situation does not arise and therefore the Std-OIT test should be adequate … Bob K.

Dr. Robert Koerner, GSI and GMA Techline

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