WANG Shu-ying, NONG Bi-geng, ZHANG Tian-bao, WANG Hai-dong. INVESTIGATION ON TEMPERATURE EFFECTS OF POSITRON ANNIHILATION LIFETIME PARAMETERS IN PET POLYMER[J]. Acta Polymerica Sinica, 1992,(2):188-195.
WANG Shu-ying, NONG Bi-geng, ZHANG Tian-bao, WANG Hai-dong. INVESTIGATION ON TEMPERATURE EFFECTS OF POSITRON ANNIHILATION LIFETIME PARAMETERS IN PET POLYMER[J]. Acta Polymerica Sinica, 1992,(2):188-195.DOI:
The positron annihilation lifetime spectra of four different kinds of specimen of polyethylene teraphalate (PET): amorphous
54℃ annealed
180℃ annealed and 85℃ stretched have been measured in a temperiture region of 22-180℃. According to the results of least square curve fitting to the spectra
it can be seen that the temperature curves of the longest lifetime annihilation parameters sensitively respond glass transition and crystallization of the PET specimens.