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Paper Titles
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Relationships between Positron Lifetime and Dynamics of Polymers

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Abstract:

In this work positron annihilation lifetime spectroscopy (PALS) is employed to study the ortho-Positronium lifetime parameters τ3>, σ3 and I3 in two structurally simple amorphous polymers 1,2-poly(butadiene) and cis-1,4-poly(isoprene). The ortho-Positronium mean lifetime parameter τ3> is compared with dynamics data from broadband dielectric spectroscopy (BDS) and electron spin resonance (ESR) experiments. Coincidences of characteristic temperatures from PALS with BDS and ESR experiments show close relationships between positron lifetime and dynamics of polymers.

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Periodical:

Materials Science Forum (Volume 733)

Pages:

179-182

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.733.179

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Online since:

November 2012

Authors:

Yang Yu, Günter Dlubek, Josef Bartoš, Helena Švajdlenková, Reinhard Krause-Rehberg

Keywords:

ESR, Free Volume, Polymer, Positron Lifetime, Structural Dynamics

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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