ASTM WK69497

    New Test Method for Measurement of Transition Temperatures of Slack Waxes used in Equine Sports Surfaces by Differential Scanning Calorimetry (DSC)

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    Developed by Subcommittee: F08.28 | Committee F08 | Contact Staff Manager



    WK69497

    1. Scope

    The differential scanning calorimetry (DSC) test is used to determine temperature transitions and melting range of wax samples. DSC can therefore demonstrate differences in heat flow rates between extracted wax samples. The wax samples are extracted from samples of the surface materials and used in a standard test based on ASTM D4419[1]. This procedure involves thermal cycling of samples between -30 C and 94 C using a known control.


    Keywords

    differential scanning calorimetry; petroleum wax; binder, thermal properties; transition temperature

    Rationale

    DSC is a convenient and rapid method for determining the temperature limits within which a wax undergoes during transitions. The highest temperature transition is a solid-liquid transition associated with complete melting; it can guide the choice of wax binders used in synthetic equine sports surfaces, provide information on the effect of operational track temperatures on binder melting, as well as giving indications of changes in the binder over time. The solid-solid temperature transition is related to the properties of the solid, that is, hardness and blocking temperature, although these slack wax-wax based binders typically contain oil contents greater that 20 % by mass and consequently are not in a hardened state unless subjected to very cold temperatures (well below -17 C).

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:
    08-11-2019

    Technical Contact:
    John Bridge

    Item:
    004

    Ballot:
    F08.28 (19-02)

    Status:
    In Balloting