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Influence of high pressure annealing on free volume in polycarbonate studied by positron annihilation

✍ Scribed by F. Szőcs; O. Šauša; K. Krištiaková; J. Krištiak; M. Klimová

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
205 KB
Volume
31
Category
Article
ISSN
0014-3057

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✦ Synopsis

Ah&met-The method of positron annihilation was used to study changes of free volume in polycarbonate. Annealing at 180°C and pressure 808 MPa causes significant changes of free volume (-23%) compared to nonannealed polycarbonate. The free volume compressibility was estimated to be -3.10-' MPa-'. The distribution of free volume has changed. This work discusses the influence of free volume on molecular dynamics and the transportation mechanism of free radical decay.

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