Measurement of the loss tangent of low-density polyethylene with a nanoindentation technique

Journal Article · Mon May 01 00:00:00 EDT 2000 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.2000.0169· OSTI ID:20216865

Loubet, J L ^[1]; Oliver, W C ^[2]; Lucas, B N ^[2]

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1. Ecole Central de Lyon, Laboratoire de Tribologie et Dynamique des Systemes, Centre National de la Recherche Scientifique, BP 163, F-69131 Ecully Cedex, (France)
2. MTS Systems Corporation, Nano Instruments Innovation Center, 1001 Larson Drive, Oak Ridge, Tennessee 37830 (United States)

This paper describes experimental measurements of the linear viscoelastic behavior of the surface of low-density (LD) polyethylene in contact with a pyramidal Berkovich diamond indenter. The experiments were carried out at two different temperatures, 15.9 and 27.2 degree sign C, between frequencies of 0.1 and 800 Hz. Using the shift of the loss tangent between the two temperatures at frequencies lower than 20 Hz and an Arrhenius equation, an activation energy of 105{+-}2 kJ/mol was obtained. This value is in good agreement with the bulk value of the {alpha} relaxation of LD polyethylene reported in the literature. (c) 2000 Materials Research Society.

• OSTI ID: 20216865
• Journal Information: Journal of Materials Research, Vol. 15, Issue 5; Other Information: PBD: May 2000; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
POLYETHYLENES
RHEOLOGY
SURFACES
TEMPERATURE RANGE 0273-0400 K
HZ RANGE
MECHANICAL TESTS
MEASURING METHODS
EXPERIMENTAL DATA