## Abstract Summary: The microstructure of the free volume and its temperature and pressure dependence in PIB were studied by PVT experiments and PALS. Employing the Simha–Somcynsky equation of state, the hole‐free volume fraction __h__ and the specific free and occupied volumes, __V__~f~ = __hV__
The temperature dependence of free positron lifetimes and positronium fractions in gaseous CO2 and SF6
✍ Scribed by G.R. Heyland; M. Charlton; T.C. Griffith; G. Clark
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 696 KB
- Volume
- 95
- Category
- Article
- ISSN
- 0301-0104
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Positron lifetime measurements, performed in the temperature range 80-300 K, are reported for polyethylene (PE) and polytetrafluoroethylene (PTFE). The lifetime spectra have been analyzed using the data processing routines LIFSPECFIT and MELT. Two long-lived components appear, which are attributed t
## Abstract Summary: The structure of the free volume and its temperature dependence between 25 and 190 °C of copolymers of styrene with acrylonitrile, SAN (0 to 50 mol‐% AN), is studied by pressure volume temperature (PVT) experiments and positron annihilation lifetime spectroscopy (PALS). In this
## Abstract Summary: The structure of the free volume and its temperature dependence between 25 and 190 °C of copolymers of styrene with acrylonitrile, SAN (0 to 50 mol‐% AN), is studied by pressure volume temperature (PVT) experiments and positron annihilation lifetime spectroscopy (PALS). In this