Authors: N Delpouve C Lixon A Saiter E Dargent J Grenet
Publish Date: 2009/04/27
Volume: 97, Issue: 2, Pages: 541-546
Abstract
Temperature modulated differential scanning calorimetry TMDSC and dynamic mechanical analysis DMA are used to calculate cooperative rearranging region CRR average sizes for drawn polyethylene terephthalate PET with different draw ratios λ ranging from λ=1 to 4 according to Donth’s approach It is shown for both studies that the CRR size decreases when increases due to the amorphous phase confinement by the crystals generated during the drawing However differences observed between the values calculated from TMDSC and DMA investigations are explained by the differences between a mechanical uniaxial dynamic solicitation DMA or a thermal solicitation TMDSC in terms of cooperative rearrangements at the glass transition
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