Equal channel angular extrusion of ultra-high molecular weight polyethylene

Steven D. Reinitz; Alexander J. Engler; Evan M. Carlson; Douglas W. Van Citters

doi:10.1016/j.msec.2016.05.085

Equal channel angular extrusion of ultra-high molecular weight polyethylene

Steven D. Reinitz, Alexander J. Engler, Evan M. Carlson, Douglas W. Van Citters

Earl E. Bakken Medical Device Center

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Ultra-high molecular weight polyethylene (UHMWPE), a common bearing surface in total joint arthroplasty, is subject to material property tradeoffs associated with conventional processing techniques. For orthopaedic applications, radiation-induced cross-linking is used to enhance the wear resistance of the material, but cross-linking also restricts relative chain movement in the amorphous regions and hence decreases toughness. Equal Channel Angular Extrusion (ECAE) is proposed as a novel mechanism by which entanglements can be introduced to the polymer bulk during consolidation, with the aim of imparting the same tribological benefits of conventional processing without complete inhibition of chain motion. ECAE processing at temperatures near the crystalline melt for UHMWPE produces (1) increased entanglements compared to control materials; (2) increasing entanglements with increasing temperature; and (3) mechanical properties between values for untreated polyethylene and for cross-linked polyethylene. These results support additional research in ECAE-processed UHMWPE for joint arthroplasty applications.

Original language	English (US)
Pages (from-to)	623-628
Number of pages	6
Journal	Materials Science and Engineering C
Volume	67
DOIs	https://doi.org/10.1016/j.msec.2016.05.085
State	Published - Oct 1 2016

Bibliographical note

Funding Information:
The authors acknowledge the NSF Research Experience for Undergraduates in Nanomaterials ( DMR-0754256 , PI's Ian Baker and Joseph BelBruno, Dartmouth College) for funding in support of AJE's preparatory work for this project, and the Holekamp Family Innovation Fellowship fund for SDR's graduate research support.

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

DMA
DSC
ECAE
Entanglements
UHMWPE

Publisher link

10.1016/j.msec.2016.05.085

Find It

Find It at U of M Libraries

Cite this

@article{c301c5656bcd49209f1f70a085c6e3c2,

title = "Equal channel angular extrusion of ultra-high molecular weight polyethylene",

abstract = "Ultra-high molecular weight polyethylene (UHMWPE), a common bearing surface in total joint arthroplasty, is subject to material property tradeoffs associated with conventional processing techniques. For orthopaedic applications, radiation-induced cross-linking is used to enhance the wear resistance of the material, but cross-linking also restricts relative chain movement in the amorphous regions and hence decreases toughness. Equal Channel Angular Extrusion (ECAE) is proposed as a novel mechanism by which entanglements can be introduced to the polymer bulk during consolidation, with the aim of imparting the same tribological benefits of conventional processing without complete inhibition of chain motion. ECAE processing at temperatures near the crystalline melt for UHMWPE produces (1) increased entanglements compared to control materials; (2) increasing entanglements with increasing temperature; and (3) mechanical properties between values for untreated polyethylene and for cross-linked polyethylene. These results support additional research in ECAE-processed UHMWPE for joint arthroplasty applications.",

keywords = "DMA, DSC, ECAE, Entanglements, UHMWPE",

author = "Reinitz, {Steven D.} and Engler, {Alexander J.} and Carlson, {Evan M.} and {Van Citters}, {Douglas W.}",

note = "Funding Information: The authors acknowledge the NSF Research Experience for Undergraduates in Nanomaterials ( DMR-0754256 , PI's Ian Baker and Joseph BelBruno, Dartmouth College) for funding in support of AJE's preparatory work for this project, and the Holekamp Family Innovation Fellowship fund for SDR's graduate research support. Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = oct,

day = "1",

doi = "10.1016/j.msec.2016.05.085",

language = "English (US)",

volume = "67",

pages = "623--628",

journal = "Materials Science and Engineering C",

issn = "0928-4931",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Equal channel angular extrusion of ultra-high molecular weight polyethylene

AU - Reinitz, Steven D.

AU - Engler, Alexander J.

AU - Carlson, Evan M.

AU - Van Citters, Douglas W.

N1 - Funding Information: The authors acknowledge the NSF Research Experience for Undergraduates in Nanomaterials ( DMR-0754256 , PI's Ian Baker and Joseph BelBruno, Dartmouth College) for funding in support of AJE's preparatory work for this project, and the Holekamp Family Innovation Fellowship fund for SDR's graduate research support. Publisher Copyright: © 2016 Elsevier B.V.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - Ultra-high molecular weight polyethylene (UHMWPE), a common bearing surface in total joint arthroplasty, is subject to material property tradeoffs associated with conventional processing techniques. For orthopaedic applications, radiation-induced cross-linking is used to enhance the wear resistance of the material, but cross-linking also restricts relative chain movement in the amorphous regions and hence decreases toughness. Equal Channel Angular Extrusion (ECAE) is proposed as a novel mechanism by which entanglements can be introduced to the polymer bulk during consolidation, with the aim of imparting the same tribological benefits of conventional processing without complete inhibition of chain motion. ECAE processing at temperatures near the crystalline melt for UHMWPE produces (1) increased entanglements compared to control materials; (2) increasing entanglements with increasing temperature; and (3) mechanical properties between values for untreated polyethylene and for cross-linked polyethylene. These results support additional research in ECAE-processed UHMWPE for joint arthroplasty applications.

AB - Ultra-high molecular weight polyethylene (UHMWPE), a common bearing surface in total joint arthroplasty, is subject to material property tradeoffs associated with conventional processing techniques. For orthopaedic applications, radiation-induced cross-linking is used to enhance the wear resistance of the material, but cross-linking also restricts relative chain movement in the amorphous regions and hence decreases toughness. Equal Channel Angular Extrusion (ECAE) is proposed as a novel mechanism by which entanglements can be introduced to the polymer bulk during consolidation, with the aim of imparting the same tribological benefits of conventional processing without complete inhibition of chain motion. ECAE processing at temperatures near the crystalline melt for UHMWPE produces (1) increased entanglements compared to control materials; (2) increasing entanglements with increasing temperature; and (3) mechanical properties between values for untreated polyethylene and for cross-linked polyethylene. These results support additional research in ECAE-processed UHMWPE for joint arthroplasty applications.

KW - DMA

KW - DSC

KW - ECAE

KW - Entanglements

KW - UHMWPE

UR - http://www.scopus.com/inward/record.url?scp=84977080468&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84977080468&partnerID=8YFLogxK

U2 - 10.1016/j.msec.2016.05.085

DO - 10.1016/j.msec.2016.05.085

M3 - Article

C2 - 27287161

AN - SCOPUS:84977080468

SN - 0928-4931

VL - 67

SP - 623

EP - 628

JO - Materials Science and Engineering C

JF - Materials Science and Engineering C

ER -

Equal channel angular extrusion of ultra-high molecular weight polyethylene

Abstract

Bibliographical note

Keywords

Publisher link

Find It

Other files and links

Fingerprint

Cite this