Scope:

Thermal-Oxidative Stability by ASTM D3012 testing method determines the thermal ageing properties of plastic samples. Originally used for polypropylene testing, this method can be used for other plastics as well. The use of a bi-axial rotator and an air recirculation oven confirm uniform exposure to all samples.

Test Procedure:

For the ASTM D3012 test, samples are fixed in the clips on the biaxial rotator. Spacers, such as the Teflon, are used to insulate samples thermally from the clips. The oven temperature and the test time are guided by the corresponding material specifications. The procedure can be executed either for a given timeframe and checked, or samples can be evaluated for time to fail at scheduled intervals.

Sample size:

ASTM D3012 standard requires a test sample of 10 mm x 50 mm x 1 mm molded to size or cut from a larger piece. GM 9509P requires a test sample of 75 mm x 25 mm x 3.2 mm, with a 45° bevel on one end.

Data:

Thermal degradation is measured by visual examination.

Conclusion:

ASTM D3012 is a standard test method for thermal-oxidative stability of polypropylene using a specimen rotator within an oven.