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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

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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
Contributors
author
  • ITA Inst. Innovative Technologies, Wiesenring 4, 06120 Lieskau (Halle/S.), Germany
author
  • Dep. of Physics, Visva-Bharati, Central University, Santiniketan, West Bengal-731235, India
  • Department of Physics, Martin-Luther-University, 06099 Halle/S., Germany
  • Institute of Physics, Maria Curie-Skłodowska University, 20-031 Lublin, Poland
author
  • H.H. Wills Physics Laboratories, Univ. of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UK
author
  • Leibniz-Institute of Polymer Research, Hohe Strasse 6, 01069 Dresden, Germany
  • Department of Physics, Martin-Luther-University, 06099 Halle/S., Germany
author
  • Institute of Physics, Maria Curie-Skłodowska University, 20-031 Lublin, Poland
author
  • H.H. Wills Physics Laboratories, Univ. of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UK
author
  • Dyneon GmbH& Co. KG, Werk Gendorf, 84504 Burgkirchen, Germany
author
  • Dyneon GmbH& Co. KG, Werk Gendorf, 84504 Burgkirchen, Germany
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
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv107n419kz
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