Temperature and torsion strain analysis of the dynamical visco-elastic properties of high-density polyethylene Online publication date: Wed, 03-Nov-2010
by M. Mateev, S. Karageorgiev
International Journal of Materials and Product Technology (IJMPT), Vol. 9, No. 4/5/6, 1994
Abstract: The behaviour of the dynamical visco-elastic functions in high-density polyethylene (HDPE), which carries the trade mark 'Bulen', in the region of gamma and beta relaxation transitions has been studied. The method of forced torsion vibrations was used to obtain the curves for the storage modulus (G'), loss modulus (G′), loss modulus (C″) and loss tangent (tgδ) in the temperature interval (-180 to + 20)°C and torsion strain (0.01 to 1.2)%. The loss functions show extremes at torsion strain S = 0.1% for the gamma relaxation transition and at S = 1.0% for the beta relaxation transition, which are explained with reference to the processes of the deformational orientation of the macromolecular chain segments, change in the micro-Brownian macromolecular mobility, the degree of anelastic intermolecular interactions, etc. The scanning electron microscopy (SEM) study shows a strong integration of the segments of the macromolecular chains into sublevels of the superstructural molecular organization and at the same time local co-operation of the sublevels.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Materials and Product Technology (IJMPT):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com