Premium
Friction, wear, and tensile properties of vacuum hot pressing crosslinked UHMWPE/nano‐HAP composites
Author(s) -
Xiong Lei,
Xiong Dangsheng,
Yang Yuanyuan,
Jin Jiabo
Publication year - 2011
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.31842
Subject(s) - materials science , composite material , crystallinity , scanning electron microscope , irradiation , differential scanning calorimetry , ultimate tensile strength , polyethylene , ultra high molecular weight polyethylene , nano , hot pressing , brittleness , physics , nuclear physics , thermodynamics
Ultra high molecular weight polyethylene (UHMWPE) is a thermoplastic engineering plastic with excellent mechanical properties. In this study, nonirradiated and irradiated UHMWPE/nano‐hydroxyapatite (nano‐HAP) composites were prepared by vacuum hot‐pressing method, and then friction, wear, and tensile properties were investigated. To explore mechanisms of these properties, differential scanning calorimetry, infrared spectrum, and scanning electron microscopy with energy dispersive spectrometry analysis were carried out on the samples. The results in this study indicated that reduced friction coefficients and wear rate could be obtained when nonirradiated and irradiated UHMWPE were filled with 7% nano‐HAP. The irradiated UHMWPE/7% nano‐HAP also had a synergistic function of wear reduction as compared with irradiated UHMWPE and nonirradiated UHMWPE/7% nano‐HAP. Samples filled with 7% nano‐HAP showed a brittle fracture behavior, and a linear relationship between modulus and crystallinity for a nonirradiated and irradiated sample was found in this study. © 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2011.