Abstract
The surface treatment of poly( p-phenylene benzobisoxazole) (PBO) fiber is to improve the interfacial adhesion of the PBO fiber-reinforced high-density polyethylene (HDPE) composite. The surface characteristics of untreated and treated PBO fiber were characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The interfacial shear strength between HDPE and PBO fiber was analyzed by measuring three-point bending properties of the composite. TPB exhibited different results due to the PBO fiber surface treatment. The results showed that the treatment of PBO fiber improved the interfacial adhesion as compared to the untreated one. The effects of PBO fiber content on tribological properties of the HDPE composites were investigated. The worn surface morphologies of HDPE composites were examined by scanning electron microscopy and the wear mechanisms were discussed. Results show that all treated PBO/HDPE have superior tribological characteristics to unfilled ones.
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