A Simplified Method for the Estimation of Hole Free Volume Fraction from the Specific Volume

• Authors: G. Dlubek , J. Pionteck
• Languages of publication: EN

Abstracts

EN

A brief introduction in the equation of state of the Simha-Somcynsky hole theory is presented. This theory allows to calculate the volume fraction h of free volume holes from pressure-volume-temperature experiments. These holes are detected by ortho-positronium and from the value of h and the mean ortho-positronium hole size the hole density may be calculated. We discuss a simplified method to estimate h which makes use of the relation V* = 1.52V_W between the scaling volume V* of the Simha-Somcynsky hole theory equation of state and the van der Waals volume V_W. Moreover, we present a new simplified method for the estimation of h which starts with the Schottky (Arrhenius) equation for the concentration of thermal vacancies and makes use of a linear relation between the scaling temperature T* and the hole formation enthalpy H_h, H_h(kJ/mol)=6.54×10^{-4}T*(K).

Keywords

EN

61.41.+e; 78.70.-g

Discipline

• 61.41.+e: Polymers, elastomers, and plastics(see also 81.05.Lg in materials science; for rheology of polymers, see section 83; for polymer reactions and polymerization, see 82.35.-x in physical chemistry and chemical physics)
• 78.70.-g: Interactions of particles and radiation with matter

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 5
• Pages: 1331-1338

Dates

published

2008-05

received

2007-09-03

Contributors

author

G. Dlubek

• ITA Institut fűr Innovative Technologien, Köthen, Aussenstelle Halle, Wiesenring 4, D-06120 Lieskau (bei Halle/S.), Germany

author

J. Pionteck

• Leibniz-Institut fűr Polymerforschung Dresden e.V., Hohe Strasse 6, D-01069 Dresden, Germany

References

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Identifiers

DOI

10.12693/APhysPolA.113.1331