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The Influence of Deformation and Chemical Composition on Elementary Free Volumes in Glassy Polymers

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Shantarovich V., Novikov Y., Suptel Z., Oleinik E., Boyce M.
Acta Physica Polonica A
|
1999
|
vol. 95
|
issue 4
659-662
EN
A relation between positronium annihilation characteristics and concentration of elementary free volumes is considered for the case of positronium formation before its localization. We estimated the diffusion coefficient of nonlocalized positronium (≈10^{-4} cm^{2}/s). The positron annihilation lifetime studies of uniaxial compression and annealing of some glassy polymers revealed variations of the shape of elementary free volumes size-distributions.
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