J. Phys. IV France 03 (1993) C4-257-C4-260
Structural transition of polyethylene oxide networks studied by positron annihilationB. 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
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.
© EDP Sciences 1993