A study of the thermal,dynamic mechanical,and tribological properties of polyphenylene sulfide composites reinforced with carbon nanofibers |
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Authors: | M H Cho S Bahadur |
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Affiliation: | (1) Department of Mechanical Engineering, Iowa state university, Ames, IA 50011-2160, USA |
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Abstract: | The thermal, dynamic mechanical, and tribological properties of polyphenylene sulfide (PPS) composites reinforced with carbon
nanofiber (CNF) were studied. Dynamic mechanical thermal analysis (DMTA) and differential scanning calorimetry (DSC) were
used to study the viscoelastic properties and thermal transitions. In order to study the tribological properties, friction
and wear tests in a pin-on-disk configuration were performed. The changes in melting point, crystallization temperature, and
glass transition temperature were found to be small as a result of reinforcement. Steady state wear rates of the reinforced
composites sliding against the counterface of roughness 0.13–0.15 μm Ra were significantly lower than that of the unreinforced
PPS. When the composites were tested against the smoother counterface of 0.06–0.11 μm Ra, the wear rates were higher. The
coefficient of friction in all the cases was not practically affected by the presence of CNF. The transfer films formed on
the counterface during sliding were examined by optical microscopy and atomic force microscopy (AFM). The variation of wear
is discussed in terms of the texture and topography of transfer film. |
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Keywords: | polyphenylene sulfide composites wear friction polymer composite carbon nanofiber transfer film AFM thermal analysis DSC DMTA heating rate |
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