1228 トコフェロール添加によるUHMWPEの分子構造および機械的特性の変化(G02-4 関節と軟骨(1),G02 バイオエンジニアリング)

概要

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Contribution of α-tocopherol as an antioxidant to the improvement of long-term oxidation resistance of UHMWPE is an unknown mechanism. For γ-irradiated (25kGy), γ-irradiated (25kGy) with 0.3wt% α-tocopherol added, and γ-irradiated (25kGy) with 0.3wt% tocopheryl acetate added UHMWPE samples, oxidation index and crystallinity were calculated from infrared absorption spectra measured using Fourier transform infrared (FT-IR) microscopy. The oxidation index of γ-irradiated UHMWPE samples was extremely higher compared to those of doped ones. The crystallinity of γ-irradiated UHMWPE samples was lower compared to those of doped ones. Accelerated aging resulted in increases in crystallinity and oxidation index particularly in the undoped γ-irradiated samples. The incorporation of α-tocopherol significantly improves the long-term oxidation stability of γ-irradiated UHMWPE. Also, the addition of α-tocopherol controls macromolecular structures resulting in an increase in crystallinity.
一般社団法人日本機械学会の論文
2005-09-18