12. Above Tg: dynamic heterogeneity and non-exponential relaxations
Above the melting point of a compound, the relaxation function of macroscopic properties f(t) generally exhibits exponential (Debye) behavior. However, when the liquid is undercooled and approaches the glass transition, f(t) deviates further and further from this exponential behavior. The system's α-type relaxations, in response to a disturbance, have a much more trailing behavior; f(t) is then well described by a "stretched exponential" law (called the Kohlraush-Williams-Watts function):
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
Above Tg: dynamic heterogeneity and non-exponential relaxations
Below Tg: aging phenomenon
Article included in this offer
"Functional materials - Bio-based materials"
(
201 articles
)
Updated and enriched with articles validated by our scientific committees
A set of exclusive tools to complement the resources
Bibliography
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
