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Insight into the Excellent Tribological Performance of Highly Oriented Poly(phenylene sulfide) |
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| Authors: | Zhang Liang-Qing Yang Shu-Gui Zhang Jing-Han Zhong Ke-Peng Zhao Zhong-Guo Chen Yan-Hui Lei Jun Zhang Qiu-Yu Li Zhong-Ming |
| Institution: | 1.College of Material Science and Engineering, Xi’an University of Science and Technology, Xi’an, 710054, China ;;2.State Key Laboratory for Mechanical Behaviour of Materials, Shaanxi International Research Center for Soft Materials, Xi’an Jiaotong University, Xi’an, 710049, China ;;3.School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Macromolecular Science and Technology, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology , Northwestern Polytechnical University, Xi’an, 710072, China ;;4.National and Local Engineering Laboratory for Slag Comprehensive Utilization and Environment Technology, School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China ;;5.College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China ; |
| Abstract: | Achieving low friction and wear of poly(phenylene sulfide) (PPS) without using fillers or blending is a challenging task, but one of considerable practical importance. Here we describe how neat PPS with high tribological performance is achieved by manipulating processing parameters (pressure, flow and temperature). The key to achieving high tribological performance is comparatively high molecular chain orientation, realized in neat PPS, at high shear rates and low pressure. The friction coefficient and wear rate are as low as ～0.3 and ～10?6 mm3·N?1·m?1, respectively, which break the record for neat PPS. These values are even better than those for PPS-based blends and comparable to PPS composites. Further studies show, for the first time, that wear rate decreases exponentially with increasing molecular chain orientation, prompting us to revise the classical Archard’s law by including the effect of molecular chain orientation. These findings open the possibility of using neat PPS in highly demanding tribological applications. |
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