ASTM WK28587

    New Test Method for Tacticity Index Measurements Of Polypropylene by Time Domain Magnetic Resonance (TD-NMR)

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    Developed by Subcommittee: D20.70.05 | Committee D20 | Contact Staff Manager



    WK28587

    1. Scope

    1.1This test method covers Time Domain Nuclear Magnetic Resonance (TD-NMR) based determination of tacticity of polypropylene resins and granules. This method may also be applicable to other polymer resins and granules. 1.2This rapid and non-destructive test procedure utilizes 20MHz (nominal) bench top TD-NMR analyzers with sampling volume of 2 10 ml at a fixed sample temperature.

    Tacticity of PP is often measured by chemical extraction methods, which are time consuming, costly on solvents and not environmental-friendly. This proposed method provides a rapid, non-destructive, non-invasive and solvent-free measurement for quality control.


    Keywords

    NMR; Magnetic Resonance; TD-NMR; Xylene Soluable; Tacticity of PP; R21; Polypropylene

    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:
    04-22-2010

    Technical Contact:

    Item:
    001

    Ballot:
    D20.70 (12-04)

    Status:
    Negative Votes Need Resolution