Citation: LI Wei, TONG Gang, ZHOU Yiqin, QI Zongneng. TSC STUDIES ON SUB-Tg STORAGE OF POLYETHYLENE TEREPHTHALATE[J]. Chinese Journal of Polymer Science, ;1987, 5(4): 285-291. shu

TSC STUDIES ON SUB-Tg STORAGE OF POLYETHYLENE TEREPHTHALATE

Received Date: 9 August 1984

The Thermally Stimulated Current (TSC) spectra of a series of Sub-Tθ annealed polyethylene terephthalate (PET) specimens have been measured. It is found that there is only one peak at 80℃ above room temperature, which related to the thermo-relaxation of frozen-in dipoles. The activation energy of such dipole motion has been calculated. The relation between the maximum current and the storage time can be explained by the free volume theory and agrees with the results from the excess thermodynamic properties.Compared with Differential Scanning Calorimeter(DSC) and tensile stree-strain method,TSC is a simpler and more sensitive method in studying Sub-Tg annealed polymers.
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