Effect of Annealing on Free-Volume Properties of Poly(ethylene Terephthalate) Studied by Positron Annihilation

• Authors: M. Misheva , N. Djourelov , I. Seganov
• Languages of publication: EN

Abstracts

EN

The effect of annealing on free-volume properties of poly( ethylene terephthalate) was studied using a set of samples annealed for two hours in air at eight temperatures between 80ºC and 220ºC. The fractional free-volume in the samples was estimated from ortho-positronium lifetime and its relative intensity. The variations of fractional free-volume and of the macroscopic specific volume with annealing temperature were compared. The variation of the pore volume probability density functions with the annealing temperature was found. The interdependence between S- and W-parameters was also discussed.

Keywords

EN

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)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 3-4
• Pages: 429-433

Dates

published

2001-03/04

received

2000-09-18

Contributors

author

M. Misheva

• Faculty of Physics, Sofia University, 5 J. Bourchier Blvd., 1126 Sofia, Bulgaria

author

N. Djourelov

• Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko shoosse Blvd., 1784 Sofia, Bulgaria

author

I. Seganov

• Faculty of Chemistry, Sofia University, 1 J. Bourchier Blvd., 1126 Sofia, Bulgaria

References

• 1. Y.C. Jean, Mater. Sci. Forum, 175-178, 59, 1995
• 2. Y.Y. Wang, H. Nakanishi, Y.C. Jean, T. Sandreczki, J. Pol. Sci. B, 28, 1431, 1990
• 3. Y. Kobayashi, W. Zheng, E.F. Meyer, J.D. McGervey, A.M. Jamieson, R. Simha, Macromol., 22, 2302, 1989
• 4. N. Djourelov, M. Misheva, J. Phys., Condens. Matter, 8, 2081, 1996
• 5. P. Kirkegaard, M. Eldrup, O.E. Mogensen, N.J. Pedersen, Comput. Phys. Commun., 23, 307, 1981
• 6. R. Gregory, J. Appl. Phys., 70, 4665, 1991
• 7. R. Gregory, Y. Zhu, Nucl. Instrum. Methods A, 290, 172, 1990
• 8. L. Xie, D.W. Gidley, H.A. Hristov, A.F. Yee, Polymer, 35, 14, 1994
• 9. H.F.M. Mohamed, Y. Ito, M. Imai, J. Chem. Phys., 105, 4841, 1996
• 10. B. Wang, C.Q. He, J.M. Zhang, S.Q. Li, S.J. Wang, J.Z. Shi, D.Z. Ma, Phys. Lett. A, 235, 557, 1997
• 11. M. Eldrup, D. Lightbody, J.N. Sherood, Chem. Phys., 63, 51, 1981
• 12. H. Nakanishi, S.J. Wang, Y.C. Jean, in: Positron Annihilation Study of Fluids, Ed. S.C. Sharma, World Scientific, Singapore 1987, p. 292
• 13. H. Nakanishi, Y.Y. Wang, Y.C. Jean, T.C. Sandreczki, in: Positron Annihilation in Fluids, Ed. S.C. Sharma, World Scientific, Singapore 1987, p. 285
• 14. G. Dlubek, J. Stejny, M.A. Alam, Macromol., 31, 4574, 1998
• 15. L. Liszkay, C. Corbel, L. Baroux, P. Hautojarvi, M. Bayhan, A.W. Brinkman, S. Tatarenko, Appl. Phys. Lett., 64, 1380, 1994

Identifiers

DOI

10.12693/APhysPolA.99.429