Recertification of the polyethylene oxidation induction time reference material

• Published in: Thermochimica acta Vol. 399; no. 1; pp. 209 - 212
• Main Authors: Blaine, Roger L, Riga, Alan T
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 24-03-2003; Elsevier Science
• Subjects: Applied sciences; Chemical reactions and properties; Degradation; Exact sciences and technology; Lifetime; Organic polymers; Oxidation induction time; Physicochemistry of polymers; Polyethylene; Stability; Polyethylene; Lifetime; Stability; Oxidation induction time; Induction period; Film; Thermooxidative degradation; Reference material; Test method; Round robin test
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/S0040-6031(02)00466-5

A commercial oxidation induction time (OIT) reference material polyethylene film is retested 6 years after its original certification. Using ASTM International Standard E 1858, the mean value, within laboratory repeatability and between laboratory reproducibility are unchanged at 29.3, 1.7 and 2.1
min, respectively. In addition, the new results are reported on an interlaboratory test (ILT) for oxidation onset temperature (OOT) for the same material using Method A (oxygen purge gas) and Method C (air purge gas) of ASTM Standard E 2009. The mean values are found to be 236.8 and 245.0
°C under oxygen and air, respectively. The within laboratory repeatability standard deviation is 1.1 and 0.68
°C, and the between laboratory reproducibility standard deviation is 1.3 and 1.4
°C, respectively, for oxygen and air.