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Title: Influence of the isothermal annealing on the free volume changes inthermo-shrunken polyethylene by positron annihilation
Authors: Osoba, Wojciech
Keywords: pozytrony; anihilacja pozytonów
Issue Date: 2001
Citation: Acta Physica Polonica A, Vol. 99, nr 3/4 (2001), s. 447-454
Abstract: Positron lifetime measurements in polyethylene have been performed. Samples of the polyethylene were isothermally annealed at three temperatures (373 K , 423 K , and 473 K ) for different time periods (from 5 min to 5 h). After cooling, the samples were used for the lifetime measurements in air at room temperature. A conventional fast-slow coincidence lifetime spectrometer with plastic scintillators has been used to perform the lifetime measurements. Mean free volumes radii and fractional free volume have been calculated from the lifetime data.
ISSN: 0587-4246
Appears in Collections:Artykuły (WNŚiT)

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