Effect of annealing on free-volume properties of poly(ethylene terephthalate) studied by positron annihilation

Authors
Misheva, M Djourelov, N Seganov, I
Citation
M. Misheva et al., Effect of annealing on free-volume properties of poly(ethylene terephthalate) studied by positron annihilation, ACT PHY P A, 99(3-4), 2001, pp. 429-433
Citations number
15
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA A
ISSN journal
05874246 → ACNP
Volume
99
Issue
3-4
Year of publication
2001
Pages
429 - 433
Database
ISI
SICI code
0587-4246(200103/04)99:3-4<429:EOAOFP>2.0.ZU;2-V
Abstract
The effect of annealing on free-volume properties of poly(ethylene terephth alate) was studied using a set of samples annealed for two hours in air at eight temperatures between 80 degreesC and 220 degreesC. The fractional fre e-volume in the samples was estimated from ortho-positronium lifetime and i ts relative intensity. The variations of fractional free-volume and of the macroscopic specific volume with annealing temperature were compared. The v ariation of the pore volume probability density functions with the annealin g temperature was found. The interdependence between S- and TY-parameters w as also discussed.