Anzeige
Erschienen in:
2001 | OriginalPaper | Buchkapitel
The Use of the Zhurkov Equation to Describe Polymer Ageing Processes
verfasst von : J. R. White
Erschienen in: Ageing Studies and Lifetime Extension of Materials
Verlag: Springer US
Enthalten in: Professional Book Archive
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
The use of the Zhurkov equation to predict the durability of polymers is discussed. It is expected that it will be obeyed when failure is controlled by a single, stress-biased, thermally activated process (e.g. a chain scission event). The mechanisms of failure are therefore considered and conditions identified for which the Zhurkov equation is likely to apply. Crack growth through chain scission at the crack tip is considered and the effect of the stress concentration is analysed. Estimates for the activation energy (42kJ/mol) and the activation volume (0.35nm3) are derived from data obtained with polystyrene samples.