ISSN:
1435-1528
Keywords:
Mechanical loss factor
;
creep
;
stress relaxation
;
HDPE
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Abstract The mechanical loss factor of high density polyethylene has been measured during creep and stress relaxation experiments. The application of a constant stress (creep) or strain (relaxation) resulted in an instantaneous increase in tan δ above the value obtained in absence of the creep or relaxation process. During the flow the tanδ-value decreased and approached an apparent equilibrium value slightly above the value obtained without the static load or deformation. This behaviour was observed both at 1 and 10 Hz and at 23 and 60 °C. It is suggested that this time dependence of the mechanical loss factor is associated with the basic mechanisms responsible for the creep or relaxation process itself.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01333874
