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Authors
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Dlubek, G. ; Gupta, A. Sen ; Wawryszczuk, J. ; Kilburn, D. ; Pionteck, J. ; Krause-Rehberg, R. ; Goworek, T. ; Alam, M. A. ; Kaspar, H. ; Lochhaas, K.H.
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Title
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The Temperature and Pressure Dependence of the Free Volume in Fluoroelastomers from PALS and PVT Experiments
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Date
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21.09.2005
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Number
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13469
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Abstract
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Positron lifetime and pressure-volume-temperature experiments were performed as function of T (100-485 K) and P (10-5 Pa-500 MPa) on a fluoroelastomer. From positron annihilation lifetime spectroscopy, analyzed with LT9.0 assuming a dispersion in the e+ (t2) and o-Ps (t3) lifetime, the mean,<vh>, and the width (standard deviation),sh, of the hole size distribution were calculated. The pressure-volume-temperature data were analyzed using the Simha-Somcynsky hole-lattice theory to estimate the specific hole free volume Vf. From a comparison of Vf with<vh> the specific hole number, N'h, is estimated. The data from thermal expansion and pressure experiments show complete agreement when taking into account the compressibility of the occupied volume.
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Publisher
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Acta Physica Polonica / A
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Wikidata
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Citation
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Acta Physica Polonica / A 107 (2005) 685-689
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DOI
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http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005AcPPA.107..685D&db_key=PHY
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