STUDY OF THE RADICAL SPECIES INDUCED BY ELECTRON-BEAM IRRADIATION IN VACUUM ON BIOMEDICAL UHMWPE

被引：8

作者：

Visco, Anna M. ^{[1
]}

Campo, Nino ^{[1
]}

Vagliasindi, Laura I. ^{[2
]}

Tabbi, Giovanni ^{[3
]}

机构：

[1] Univ Messina, Ind Chem & Mat Engn Dept, Fac Engn, I-98166 Messina, Italy

[2] Univ Catania, Dept Chem Sci, Catania, Italy

[3] CNR, Biostruct & Bioimages Inst, Support Org Unit Catania, Catania, Italy

来源：

INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION | 2010年 / 15卷 / 07期

关键词：

EPR; Free radicals; Irradiation; Mechanical properties; Polyethylene (UHMWPE); MOLECULAR-WEIGHT POLYETHYLENE; CROSS-LINKING; AIR; EPR; DEPENDENCE; ION;

D O I：

10.1080/1023666X.2010.510109

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Ultra high molecular weight polyethylene (UHMWPE) is a component of mobile prostheses. The irradiation performed to sterilize and cross-link the polymer limits its life because of the free radicals originated during this process. In this work, a UHMWPE was electron-beam irradiated under high vacuum and annealed. Mechanical tests were performed on the UHMWPE samples before and after the annealing treatment. The results were compared with a study of radical species type and amount and the crystalline degree changes. Experimental results show that the annealing treatment prevents degrading reactions, favors intermolecular and/or intramolecular chemical rearrangements, and improves wear resistance without compromising the typical elasto-plastic mechanical behavior.

引用

页码：424 / 437

页数：14

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