STP1326

    A Proposed Reference Material for Oxidative Induction Time by Differential Scanning Calorimetry

    Published: Jan 1997


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    Abstract

    A polyethylene film sample, inhibited with a hindered phenol antioxidant, is proposed as a Standard Reference Material for oxidative induction time (OIT) testing. The mean OIT values, derived from nine interlaboratory studies and for a number of experimental conditions, are presented. The material is found to be statistically homogeneous, a necessary condition for a reference material. Further, the effects of temperature, oxygen pressure, and storage time on the proposed reference material are explored. As a kinetic parameter, the OIT value appears to be decreasing with time but in a well behaved and predictable manner. The use of a table and graph permit the user of the material to estimate its OIT value in the future. Because the material has been thoroughly tested in a wide variety of OIT conditions, it appears to be the best currently available candidate and is offered for consideration as an OIT Reference Material.

    Keywords:

    calibration, differential scanning calorimetry, oxidation, oxidative induction time, oxidative stability, reference materials, thermal analysis


    Author Information:

    Blaine, RL
    Applications development manager and applications chemist, TA Instruments, Inc., New Castle, DE

    Harris, MB
    Applications development manager and applications chemist, TA Instruments, Inc., New Castle, DE


    Paper ID: STP13823S

    Committee/Subcommittee: E37.01

    DOI: 10.1520/STP13823S


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