Ice formation on aircraft surfaces effects aircraft performance by increasing weight and drag leading to loss of lift. Current active alleviation strategies involve pneumatic boots, heated surfaces, and usage of glycol based de-icing fluids. Mitigation or reduction of in-flight icing by means of a passive approach may enable retention of aircraft capabilities, i.e., no reduction in lift, while reducing the aircraft weight and mechanical complexity. Under a NASA Aeronautics Research Institute Seedling activity, the effect of end group functionality and chain length upon ice adhesion shear strength (IASS) was evaluated with the results indicating that chemical functionality and chain length (i.e. molecular flexibility) affected IASS. Based on experimental and modeling results, diamine monomers incorporating molecular flexibility as either a side chain or in between diamine functionalities were prepared, incorporated into epoxy resins that were subsequently used to fabricate coatings on aluminum substrates, and tested in a simulated icing environment. The IASS was found to be lower when molecular flexibility was incorporated in the polymer chain as opposed to a side chain.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Effect of Molecular Flexibility upon Ice Adhesion Shear Strength


    Contributors:

    Conference:

    Annual Meeting of the Adhesion Society ; 2016 ; San Antonio, TX, United States


    Publication date :

    2016-02-21


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Effect of Molecular Flexibility upon Ice Adhesion Shear Strength

    J. G. Smith / C. J. Wohl / R. E. Kreeger et al. | NTIS | 2016


    Surface Chemical Functionality Effect Upon Ice Adhesion Shear Strength

    Smith, Joseph G. / Wohl, Christopher J. / Kreeger, Richard E. et al. | AIAA | 2016


    Surface Chemical Functionality Effect Upon Ice Adhesion Shear Strength (AIAA 2016-3444)

    Smith, Joseph G. / Wohl, Christopher J. / Kreeger, Richard E. et al. | British Library Conference Proceedings | 2016


    Effect of shear lag upon wing strength

    Sibert, H.W. | Engineering Index Backfile | 1939


    TARPAULIN HAVING IMPROVED FLEXIBILITY, ADHESION, AND SURFACE STRENGTH AND MANUFACTURING METHOD THEREFOR

    CHUNG EUN HA / KIM KYOUNG JOONG | European Patent Office | 2021

    Free access