2005
DOI: 10.1515/polyeng.2005.25.4.277
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Correlation of Mechanical and Chemical Changes in Gamma-Irradiated Ultra-High Molecular Weight Polyethylene

Abstract: Ultra-high molecular weight polyethylene (UHMWPE) is used in the manufacture of several products due to its excellent engineering propertieshigh tensile and impact strength, low friction coefficient, resistance to chemical attack and biocompatibility. It is well known that gamma irradiation introduces structural changes that may be detrimental to the integrity and performance of the polymer, limiting its useful life. Plates manufactured with commercial, general-grade, UHMWPE were exposed to several doses of ga… Show more

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Cited by 4 publications
(5 citation statements)
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“…However, some limitations have been noted about crystallinity assessments using FTIR, because the corresponding absorption peaks require complex analysis (doublets at 720/731 cm −1 and 1464/1474 cm −1 ) or may be affected by chain branching (band at 1897 cm −1 ). On the other hand, differential scanning calorimetry (DSC) is routinely performed to analyze thermal, thermoxidative, and structural properties (e.g., crystallinity) of medical polyethylene 21–25. However, DSC also presents certain disadvantages, as it involves the destruction of the sample, and the degree of crystallinity calculated by DSC may vary with sample weight by up to 5% 26…”
Section: Introductionmentioning
confidence: 99%
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“…However, some limitations have been noted about crystallinity assessments using FTIR, because the corresponding absorption peaks require complex analysis (doublets at 720/731 cm −1 and 1464/1474 cm −1 ) or may be affected by chain branching (band at 1897 cm −1 ). On the other hand, differential scanning calorimetry (DSC) is routinely performed to analyze thermal, thermoxidative, and structural properties (e.g., crystallinity) of medical polyethylene 21–25. However, DSC also presents certain disadvantages, as it involves the destruction of the sample, and the degree of crystallinity calculated by DSC may vary with sample weight by up to 5% 26…”
Section: Introductionmentioning
confidence: 99%
“…On the other hand, differential scanning calorimetry (DSC) is routinely performed to analyze thermal, thermoxidative, and structural properties (e.g., crystallinity) of medical polyethylene. [21][22][23][24][25] However, DSC also presents certain disadvantages, as it involves the destruction of the sample, and the degree of crystallinity calculated by DSC may vary with sample weight by up to 5%. 26 Recent studies have highlighted the potential utility of Raman spectroscopy for characterization of polyethylene used in total joint replacements.…”
Section: Introductionmentioning
confidence: 99%
“…Most polymers, exposed to gamma source, have changed mechanical properties from ductile to brittle. Suarez et al have studied the correlation of mechanical and chemical changes in gammairradiated ultra-high-molecular-weight polyethylene [1].…”
Section: Resultsmentioning
confidence: 99%
“…Polymer structures, especially copolymers, are attractive due to their mechanical [1], optical [2][3][4] and electrical [5,6] properties. Hydrophilically modified polymers have been used in coatings, paints, cosmetics, drilling fluids, in food industry, for petroleum recovery and also in the drug release systems in medical industry [7][8][9].…”
Section: Introductionmentioning
confidence: 99%
“…Observa-se, ainda, que o polímero irradiado na faixa de doses entre 100 kGy e 150 kGy apresentou, após envelhecimento, uma transição no seu comportamento mecânico, enquanto que, no material não envelhecido, a dureza aumentou com a dose de radiação gama. (20,21) Verifica-se, tendo em vista os resultados obtidos nos ensaios de determinação percentagem de gel e de espectroscopia na região do infravermelho (FTIR), que envelhecimento ao ar influenciou o comportamento mecânico do UHMWPE. A gama dos polietilenos gera radicais livres que podem produzir reticulação e cisão de cadeias.…”
Section: Ensaio De Durezaunclassified