Temperature dependence of dynamic yield stress in amorphous polymers as indicator for the dynamic glass transition at negative pressure

Authors
Lach, R Grellmann, W Schroter, K Donth, E
Citation
R. Lach et al., Temperature dependence of dynamic yield stress in amorphous polymers as indicator for the dynamic glass transition at negative pressure, POLYMER, 40(6), 1999, pp. 1481-1485
Citations number
38
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER
ISSN journal
00323861 → ACNP
Volume
40
Issue
6
Year of publication
1999
Pages
1481 - 1485
Database
ISI
SICI code
0032-3861(199903)40:6<1481:TDODYS>2.0.ZU;2-W
Abstract
The dynamic yield stress for polycarbonate, polystyrene and poly(methyl met hacrylate) was measured by an instrumented Charpy impact tester in a wide t emperature range. The dynamic yield stress is interpreted as being proporti onal to a negative pressure. The temperature dependence can be described by a Williams-Landel-Ferry type of equation. The extrapolation to ambient pre ssure leads to the main or transition and is used to connect the dynamic yi eld stress to the pressure dependence of the ct dispersion zone. (C) 1998 E lsevier Science Ltd. All rights reserved.