U-tube test method

Table V also compares the U-tube methods with 25-mil plaques exposed at 150 °C. in a tubular oven. The resins are arranged in order of stability of the 25-mil tubular oven exposures. Again, there is considerable lack of correlation between the tubular-oven exposure of plaques and the U-tube test methods. Resin D, which is best in the U-tube/...

Table V also compares oxygen uptake with the U-tube test methods at 150°C. Except for E and I, there appears to be a fair degree of corre-...

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