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Friction and Wear Behaviors of Two Kinds of Hydroxyl-Terminated Polydimethylsiloxane-Modified PU/EP IPN Composites Under Dry Sliding Conditions

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In this study, a systematic investigation on the tribological properties of two kinds of hydroxyl-terminated polydimethylsiloxane (HTPDMS)-modified castor oil-based polyurethane/epoxy resin (PU/EP) interpenetrating polymer network composites (IPN) was carried out through a pin-on-disk arrangement under dry sliding conditions. Experimental results revealed that the incorporation of HTPDMS can significantly improve the friction and wear properties of PU/EP IPN. Further, it was found that both the friction coefficient and wear loss decreased with increasing content of HTPDMS. The worn surface of the PU/EP IPN matrix and the modified composites were analyzed using scanning electron microscope and 3D noncontact surface-mapping profiler. The as-prepared and worn surfaces of the HTPDMS-modified PU/EP IPN were also investigated using X-ray photoelectron spectroscopy. The mechanisms for the improvement of tribological properties were discussed.

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The financial supports from the National Science Foundation for Distinguished Young Scholars of China (Grant No. 51025517), the Innovative Group Foundation of NSFC (Grant No. 50721062), and the 973 Project of China (2007CB607606) are duly acknowledged.

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Correspondence to Qihua Wang.

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Chen, S., Wang, Q. & Wang, T. Friction and Wear Behaviors of Two Kinds of Hydroxyl-Terminated Polydimethylsiloxane-Modified PU/EP IPN Composites Under Dry Sliding Conditions. Tribol Lett 43, 319–327 (2011).

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  • Polymers
  • Self-lubricating composites
  • Rolling-contact fatigue