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Free-volume evolution in the system polycarbonate–polycaprolaptone studied by positron annihilation spectroscopy

✍ Scribed by J. del Río; J. Serna; F. Plazaola; J.J. Iruin; J.L. Nazabal

Book ID
117145047
Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
67 KB
Volume
287
Category
Article
ISSN
0022-3093

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## 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