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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
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.
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页码:424 / 437
页数:14
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