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  • The relation between relaxed enthalpy and volume during physical aging of amorphous polymers and selenium
    Slobodian, Petr ...
    This paper reports physical aging results for PMMA, PMMA/PEO blends, PS, PC, PVC and PET (semicrystalline). Also included in this study is amorphous selenium. Temperature down-jumps from equilibrium ... above Tg to a temperature below Tg were carried out. Relaxed enthalpy, dh and volume contraction, dv, were measured. From the aging records, the constant ratio dh/dv = Ka was evaluated. For the polymeric samples Ka values of about 2 GPa were observed, thus similar to the inverse value of the isothermal compressibility close to Tg. Similarly for Se the Ka value obtained from dh and dv was in fair agreement with its isothermal compressibility.
    Vir: European Polymer Journal. - ISSN 0014-3057 (Letn. 42, št. 10, 2006, str. 2824-2837)
    Vrsta gradiva - članek, sestavni del
    Leto - 2006
    Jezik - angleški
    COBISS.SI-ID - 9595675

vir: European Polymer Journal. - ISSN 0014-3057 (Letn. 42, št. 10, 2006, str. 2824-2837)

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