NDLI: The Effect of Crosslinks on the Sliding Wear of High-Density Polyethylene

Content Provider	Springer Nature Link
Author	Molinari, E. C. Failla, M. D. Tuckart, W. R.
Copyright Year	2016
Abstract	The purpose of this study was to determinate the influence of the molecular crosslinking in the wear resistance of a linear polyethylene (PE) sliding against a rough steel surface. A set of PEs with different degrees of crosslinks were obtained by chemical modification of a PE with varying concentrations of organic peroxide. The amount of gel, molecular weight between crosslinks (M $_{c}$), crystallinity and Vickers microhardness were determined in the crosslinked PE’s. The tribological performance of the materials was evaluated under dry sliding conditions using a block-on-ring tester. The coefficient of friction and the wear rate were determined in experiments in which a sample of polymer was contacted with the peripheral surface of a steel ring rotating at constant velocity. The wear resistance of the crosslinked materials increases with the amount of gel and when M $_{c}$ decreases. The crosslinked PE showed a wear rate lower than the original PE when the amount of gel was larger than 80 % of the total mass. The coefficient of friction of the PE and crosslinked material was about 0.2 regardless of the normal load applied. The analysis of the worn surfaces by optical and SEM microscopy reveals that the primary mechanism involved in wear is abrasive wear.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	64
Issue Number	2
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2016-10-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polyethylene Crosslinking Wear Friction Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Theoretical and Applied Mechanics Physical Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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