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HA/UHMWPE nanocomposite produced by twin-screw extrusion

Authors Fang, Liming HKUST affiliated (currently or previously)
Leng, Yang View this author's profile
Gao, Ping View this author's profile
Issue Date 2005
Source Journal Wuhan University of Technology, Materials Science Edition , v. 20, (SUPPL.), 2005, p. 175-177
Summary The HA/UHMWPE nanocomposite is compounded by twin-screw extrusion of the HA and UHM-WPE powder mixture in paraffin oil and then compression molded to a sheet form. TGA measurement shows the HA weight loss after processing is about 1%-2%. FTIR spectra indicate the paraffin oil residue is trivial and UHMWPE is not oxidized. SEM reveals the HA nano particles are homogeneously dispersed by twin-screw extrusion and the inter-particle spaces are penetrated with UHMWPE fibrils by swelling treatment. HRTEM image indicates the HA particles and UHMWPE are intimately contacted by mechanical interlocking. Compared with the unfilled UHMWPE, stiffness of the composite with the HA volume fraction 0.23 was significantly enhanced to 9 times without detriment of the yield strength and the ductility.
ISSN 1000-2413
Language English
Format Article
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