Influence of the Isothermal Annealing on the Free Volume Changes in Thermo-Shrunken Polyethylene by Positron Annihilation

• Authors: W. Osoba
• Languages of publication: EN

Abstracts

EN

Positron lifetime measurements in polyethylene have been performed. Samples of the polyethylene were isothermally annealed at three temperatures (373 K, 423 K, and 473 K) for different time periods (from 5 min to 5 h). After cooling, the samples were used for the lifetime measurements in air at room temperature. A conventional fast-slow coincidence lifetime spectrometer with plastic scintillators has been used to perform the lifetime measurements. Mean free volumes radii and fractional free volume have been calculated from the lifetime data.

Keywords

EN

71.60.+z; 78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 3-4
• Pages: 447-454

Dates

published

2001-03/04

received

2000-09-18

Contributors

author

W. Osoba

• Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.99.447