Investigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics

Oxidation degradation of gamma-irradiated UHMWPE (Ultra-high Molecular Weight Polyethylene) is a well-known problem related to the failure of total joint replacement. The purpose of this study is to investigate the effects of oxidation on the mechanical and wear properties and to identify the main c...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Lei Zhang, Yoshinori Sawae, Tetsuo Yamaguchi, Teruo Murakami, Hong Yang
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2015
Materias:	uhmwpe wear oxidation crosslinking gamma-irradiation shelf-ageing Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/246c79af5ddd410a9a377be9d78e734b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:246c79af5ddd410a9a377be9d78e734b
record_format	dspace
spelling	oai:doaj.org-article:246c79af5ddd410a9a377be9d78e734b2021-11-05T09:22:44ZInvestigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics1881-219810.2474/trol.10.1https://doaj.org/article/246c79af5ddd410a9a377be9d78e734b2015-01-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/10/1/10_1/_pdf/-char/enhttps://doaj.org/toc/1881-2198Oxidation degradation of gamma-irradiated UHMWPE (Ultra-high Molecular Weight Polyethylene) is a well-known problem related to the failure of total joint replacement. The purpose of this study is to investigate the effects of oxidation on the mechanical and wear properties and to identify the main causes of the change of wear mechanisms of crosslinked UHMWPE (50 kGy and 100 kGy) after long-term shelf-ageing. The techniques used were FTIR mapping and micro-indentation test, which were performed on the same cross-section of UHMWPE specimen. Three distinct regions (the surface region, the more oxidized subsurface region, and the less oxidized center region) were prepared to carry out the differential scanning calorimetry (DSC) and multi-directional wear tests. The worn surfaces were checked by optical microscopy and scanning electron microscopy to reveal the wear mechanisms. The experimental results showed that the micro-hardness, elastic modulus and crystallinity increased with the increase of the oxidation index. The wear resistance deteriorated when the oxidation index increased. The slope of specific wear rate against oxidation index of the 100 kGy sample is higher than that of the 50 kGy sample. Our results may indicate that, when the oxidation index is lower than the critical threshold, the wear mechanism is mainly dependent on crosslinking density; when the oxidation index is higher than the critical threshold, the oxidation behavior plays an important role in the change of wear mechanisms.Lei ZhangYoshinori SawaeTetsuo YamaguchiTeruo MurakamiHong YangJapanese Society of Tribologistsarticleuhmwpewearoxidationcrosslinkinggamma-irradiationshelf-ageingPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 10, Iss 1, Pp 1-10 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	uhmwpe wear oxidation crosslinking gamma-irradiation shelf-ageing Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	uhmwpe wear oxidation crosslinking gamma-irradiation shelf-ageing Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Lei Zhang Yoshinori Sawae Tetsuo Yamaguchi Teruo Murakami Hong Yang Investigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics
description	Oxidation degradation of gamma-irradiated UHMWPE (Ultra-high Molecular Weight Polyethylene) is a well-known problem related to the failure of total joint replacement. The purpose of this study is to investigate the effects of oxidation on the mechanical and wear properties and to identify the main causes of the change of wear mechanisms of crosslinked UHMWPE (50 kGy and 100 kGy) after long-term shelf-ageing. The techniques used were FTIR mapping and micro-indentation test, which were performed on the same cross-section of UHMWPE specimen. Three distinct regions (the surface region, the more oxidized subsurface region, and the less oxidized center region) were prepared to carry out the differential scanning calorimetry (DSC) and multi-directional wear tests. The worn surfaces were checked by optical microscopy and scanning electron microscopy to reveal the wear mechanisms. The experimental results showed that the micro-hardness, elastic modulus and crystallinity increased with the increase of the oxidation index. The wear resistance deteriorated when the oxidation index increased. The slope of specific wear rate against oxidation index of the 100 kGy sample is higher than that of the 50 kGy sample. Our results may indicate that, when the oxidation index is lower than the critical threshold, the wear mechanism is mainly dependent on crosslinking density; when the oxidation index is higher than the critical threshold, the oxidation behavior plays an important role in the change of wear mechanisms.
format	article
author	Lei Zhang Yoshinori Sawae Tetsuo Yamaguchi Teruo Murakami Hong Yang
author_facet	Lei Zhang Yoshinori Sawae Tetsuo Yamaguchi Teruo Murakami Hong Yang
author_sort	Lei Zhang
title	Investigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics
title_short	Investigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics
title_full	Investigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics
title_fullStr	Investigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics
title_full_unstemmed	Investigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics
title_sort	investigation on oxidation of shelf-aged crosslinked ultra-high molecular weight polyethylene (uhmwpe) and its effects on wear characteristics
publisher	Japanese Society of Tribologists
publishDate	2015
url	https://doaj.org/article/246c79af5ddd410a9a377be9d78e734b
work_keys_str_mv	AT leizhang investigationonoxidationofshelfagedcrosslinkedultrahighmolecularweightpolyethyleneuhmwpeanditseffectsonwearcharacteristics AT yoshinorisawae investigationonoxidationofshelfagedcrosslinkedultrahighmolecularweightpolyethyleneuhmwpeanditseffectsonwearcharacteristics AT tetsuoyamaguchi investigationonoxidationofshelfagedcrosslinkedultrahighmolecularweightpolyethyleneuhmwpeanditseffectsonwearcharacteristics AT teruomurakami investigationonoxidationofshelfagedcrosslinkedultrahighmolecularweightpolyethyleneuhmwpeanditseffectsonwearcharacteristics AT hongyang investigationonoxidationofshelfagedcrosslinkedultrahighmolecularweightpolyethyleneuhmwpeanditseffectsonwearcharacteristics
_version_	1718444397208535040

Investigation on Oxidation of Shelf-Aged Crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and Its Effects on Wear Characteristics

Ejemplares similares