Free-Volume Studies in Polycaprolactone/Poly(propylene oxide) Urethane/Urea Membranes by Positron Lifetime Spectroscopy

• Authors: M. Ferreira Marques , P. Gordo , A. de Lima , D. Queiroz , M. Norberta de Pinho , P. Major , Zs. Kajcsos
• Languages of publication: EN

Abstracts

EN

Positron annihilation lifetime spectroscopy was used to study the free volume parameters in polypropylene oxide-based tri-isocyanate terminated prepolymer/polycaprolactone diol bi-soft urethane/urea membranes (PU/PCL) with PCL content from 5 up to 25 wt%. Positron annihilation lifetime spectroscopy measurements carried out in the temperature range 298-324 K mirrored the phase separation of the various soft and hard segments present in the membranes. The size and amount of free volume holes determined by positron annihilation lifetime spectroscopy appear to be correlated with the CO_2 gas permeability through the membranes.

Keywords

EN

61.41.+e; 78.70.Bj; 82.30.Gg

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)
• 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)
• 82.30.Gg: Positronium chemistry(see also 36.10.Dr Positronium in atomic and molecular physics; 78.70.Bj Positron annihilation in 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: 1359-1364

Dates

published

2008-05

received

2007-09-03

Contributors

author

M. Ferreira Marques

• Department of Chemical Engineering, Instituto Superior de Engenharia, 3031-199 Coimbra, Portugal
• ICEMS, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal

author

P. Gordo

• ICEMS, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal

author

A. de Lima

• ICEMS, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal

author

D. Queiroz

• Department of Chemical Engineering, Instituto Superior Técnico, 1049-001 Lisboa, Portugal

author

M. Norberta de Pinho

• Department of Chemical Engineering, Instituto Superior Técnico, 1049-001 Lisboa, Portugal

author

P. Major

• KFKI Research Institute for Particle and Nuclear Physics, P.O.B. 49, 1525 Budapest, Hungary

author

Zs. Kajcsos

• KFKI Research Institute for Particle and Nuclear Physics, P.O.B. 49, 1525 Budapest, Hungary

References

• 1. A. Korematsu, Y. Takemoto, T. Nakaya, H. Inone, Biomaterials 23, 293 (2002)
• 2. Principles and Application of Positron and Positronium Chemistry, Eds. Y.C. Jean, P.E. Mallon, D.M. Schrader, World Sci., Singapore 2003
• 3. Y.C. Jean, in: Positron Spectroscopy of Solids, Proc. Intern. School of Physics 'Enrico Fermi', Course CXXV, 1993, Eds. A Dupasquier, A.P. Mills jr, IOS Press, Amsterdam 1995, p.563
• 4. G. Dlubek, H.M. Fretwell, M.A. Alam, Macromolecules 33, 187 (2000)
• 5. G. Dlubek, J. Stejny, T.H. Luepke, D. Bamford, D. Petters, C.H. Huebner, M.A. Alam, M.J. Hill, J. Poly. Sci., Part B, Polym. Phys. 40, 65 (2002)
• 6. D. Bamford, G. Dlubek, G. Dommet, S. Hoering, T. Luepke, D. Kilburn, M.A. Alam, Polymer 47, 3486 (2006)
• 7. G. Dlubek, M.Q. Shaikh, R. Krause-Rehberg, M. Paluch, J. Chem. Phys. 126, 024906 (2007)
• 8. S.J. Tao, J. Chem. Phys. 56, 5499 (1972)
• 9. M. Eldrup, D. Lightbody, J.N. Sherwood, Chem. Phys. 63, 51 (1981)
• 10. D.W. Gidley, W.E. Frieze, A.F. Yee, E.T. Ryan, H.M. Ho, Phys. Rev. B 60, R5157 (1999)
• 11. T. Goworek, K. Ciesielski, B. Jasińska, J. Wawryszczuk, Radiat. Phys. Chem. 58, 719 (2000)
• 12. H. Nakanishi, S.J. Wang, Y.C. Jean, in: Positron Annihilation Studies of Fluids, Eds. S.C. Sharma, World Sci., Singapore 1988, p. 292
• 13. F.H.J. Maurer, M. Schmid. Radiat. Phys. Chem. 58, 509 (2000)
• 14. M.F. Ferreira Marques, C. Lopes Gil, P.M. Gordo, A.P. de Lima, Zs. Kajcsos, D.P. Queiroz, M.N. de Pinho, Radiat. Phys. Chem. 68, 573 (2003)
• 15. K. Kumar, Siddaramaiah, G.N. Kumaraswamy, H.B. Ravikumar, G. Ranganathaiah, Polym. Int. 54, 1401 (2005)
• 16. M.F. Ferreira Marques, C. Lopes Gil, P.M. Gordo, A.P. de Lima, D. Placco Queiroz, M.N. de Pinho, Zs. Kajcsos, G. Duplâtre, Mater. Sci. Forum 445-446, 289 (2004)
• 17. M.F. Ferreira Marques, P.M. Gordo, Zs. Kajcsos, C. Lopes Gil, A.P. de Lima, D.P. Queiroz, M.N. de Pinho, Radiat. Phys. Chem. 76, 129 (2007)
• 18. J. Kansy, Nucl. Instrum. Methods Phys. Res. A 374, 235 (1996)
• 19. C. Nagel, K. Gűnther-Schade, D. Fritsch, T. Strunskus, F. Faupel, Macromolecules 35, 2071 (2002)

Identifiers

DOI

10.12693/APhysPolA.113.1359