## Abstract The positron annihilation lifetime spectroscopy (PALS) technique is used to measure volume relaxation in physically aged glassy polycarbonate. The relaxation times and activation energy calculated for the isothermal relaxations in the aged polycarbonate are greater than those parameters
Relaxation behavior of polymers probed by positron annihilation lifetime spectroscopy
β Scribed by Takenori Suzuki; Chunqing He; Victor Shantarovich; Kenjiro Kondo; Yasuo Ito; Lin Ma; Masaru Matsuo
- Publisher
- Maney Publishing
- Year
- 2003
- Tongue
- English
- Weight
- 237 KB
- Volume
- 7
- Category
- Article
- ISSN
- 1432-8917
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π SIMILAR VOLUMES
Amorphous and crystalline poly(silylenemethylene)s with the repeating PhRSiCH 2 (R : Me or Ph) units were characterized by positron annihilation lifetime spectroscopy (PALS) to gain insights into the molecular motions of these polymers. The temperature dependence of the ortho-positronium lifetime (
## Abstract Positron annihilation lifetime spectroscopy (PALS) measurements were performed to study the influence of the sintering temperature, heating rate and dwell time on the porosity and on the defect concentration on series of spark plasma sintered alumina samples. Two longβlived components w