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2005 | 107 | 4 | 685-689
Article title

The Temperature and Pressure Dependence of the Free Volume in Fluoroelastomers from PALS and PVT Experiments

Content
Title variants
Languages of publication
EN
Abstracts
EN
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^+ (τ_2) and o-Ps (τ_3) lifetime, the mean, 〈v_h〉, and the width (standard deviation), σ_h, 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 V_f. From a comparison of V_f with 〈v_h〉 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.
Keywords
EN
Year
Volume
107
Issue
4
Pages
685-689
Physical description
Dates
published
2005-04
received
2004-09-20
References
  • 1. L.A. Utracki, R. Simha, Macromol. Theory Simul., 10, 17, 2001
  • 2. G. Dlubek, J. Pionteck, D. Kilburn, Macromol. Chem. Phys., 205, 500, 512, 2004
  • 3. G. Dlubek, A. Sen Gupta, J. Pionteck, R. Krause-Rehberg, H. Kaspar, K.H. Lochhaas, Macromolecules, 37, 6606, 2004
  • 4. G. Dlubek, J. Wawryszczuk, J. Pionteck, T. Goworek, H. Kaspar, K.H. Lochhaas, Macromolecules, in press
  • 5. J. Kansy, Nucl. Instrum. Methods Phys. Res. A, 374, 235, 1996 and private communication, 2002
  • 6. Principles and Application of Positron and Positronium Chemistry, Eds. Y.C. Jean, P.E. Mallon, D.M. Schrader, World Scientific, Singapore 2003
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv107n419kz
Identifiers
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