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Time-temperature equivalence free volume theory

Time-temperature superposition (tTs) was carried out for these multi-temperature multi-frequency tests based on Williams-Landel-Ferry (WLF) relationship. It considers the equivalency of time and temperature in the context of free volume theory for an activated flow process in viscoelastic materials such as PET. It has been found the tTs holds for the whole temperature/frequenQr range. The master curve generated from tTs is shown in Figure 13 for the 10 wt. % bamboo-PET composite at the 25.0 C reference temperature. The time-temperature superposition shift factor follows Arrhenius temperature dqrendence according to the expression ... [Pg.374]

See other pages where Time-temperature equivalence free volume theory is mentioned: [Pg.177]    [Pg.135]    [Pg.210]    [Pg.33]    [Pg.44]    [Pg.124]    [Pg.659]    [Pg.17]    [Pg.499]    [Pg.210]    [Pg.60]    [Pg.54]    [Pg.734]   
See also in sourсe #XX -- [ Pg.154 ]



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