Numéro
J. Phys. IV France
Volume 03, Numéro C4, Septembre 1993
4th International Workshop on Positron and Positronium Chemistry
Page(s) C4-257 - C4-260
DOI http://dx.doi.org/10.1051/jp4:1993439
4th International Workshop on Positron and Positronium Chemistry

J. Phys. IV France 03 (1993) C4-257-C4-260

DOI: 10.1051/jp4:1993439

Structural transition of polyethylene oxide networks studied by positron annihilation

B. WANG1, Z.L. PENG1, Y.Q. DAI1, S.Q. LI1, S.J. WANG1, H. LIU2 and H.Q. XIE2

1  Department of Physics, Wuhan University, Wuhan 430072, P.R. of China
2  Departement of Chemistry, University Huazhong of Sci. [MATH] Tech., Wuhan 430074, P.R. of China


Abstract
Positron lifetime spectra have been measured for network polyethylene oxide (PEO) in the temperature range of 120 - 345K. The glass transition and secondary structural transition have been observed and the transition temperatures were determined. The changes of free-volume in amorphous regions and the defect properties in crystalline are discussed.



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