When studying the climatic aging of polymer composite materials, it is necessary to control and take into account the following processes and transformations: binder plasticization by atmospheric moisture; swelling (thickness gain) upon moisture sorption; binder destruction under the action of solar UV radiation and air oxygen; binder hydrolysis by moisture; binder postcuring activated by temperature and the plasticizing moisture effect; misalignment of organic fibers under solar UV irradiation, hygrothermal cycling, and mechanical loading; structural relaxation and shrinkage of fibers, forming the frame made of the reinforcing filler; structural relaxation of the binder; formation of pores, microcracks, and other microdefects in the binder bulk and at the polymer filler interface; and the formation of surface crazes, laminations, and large defects. The quantitative control of the listed transformations occurring upon exposure to natural climatic conditions forms the basis for a reliable prediction of PCM mechanical properties for a given exploitation period.


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    Title :

    Climatic aging of composite aviation materials: I. Aging mechanisms


    Additional title:

    Klimabedingte Alterung von Luftfahrt-Verbundwerkstoffen: Alterungsmechanismen


    Contributors:

    Published in:

    Publication date :

    2011


    Size :

    8 Seiten, 8 Bilder, 2 Tabellen, 52 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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