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<p>This study aimed to investigate the influence of molecular structure on the tribological performance. In this study, five types of base stocks were used as test samples. The molecular structures were characterized using gas chromatography–mass spectrometry (GC–MS) and nuclear magnetic esonance (NMR) spectroscopy. Tribological properties were evaluated using a ring–block friction and wear test rig. The results indicate that higher X<sub>t</sub>/X<sub>b</sub> ratios and higher X<sub>NP</sub> values in base stocks correlated with lower friction coefficients and reduced wear-scar widths, which are attributed to the ordered molecular layers. The base stock’s molecular structure remained crucial for overall tribological performance in the presence of lubricant additives.</p>

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The Effect of Base Stock Group on Molecular Structure and Tribological Performance

  • 期刊论文

  • 发表日期：

    2026年3月16日

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  • Feng Zhu,
  • Yixi Shao,
  • Boxi Tian,
  • Zifei Zhao,
  • Yichao Zhu,
  • Liangyan Zheng,
  • Weiwei Wang

摘要

This study aimed to investigate the influence of molecular structure on the tribological performance. In this study, five types of base stocks were used as test samples. The molecular structures were characterized using gas chromatography–mass spectrometry (GC–MS) and nuclear magnetic esonance (NMR) spectroscopy. Tribological properties were evaluated using a ring–block friction and wear test rig. The results indicate that higher Xt/Xb ratios and higher XNP values in base stocks correlated with lower friction coefficients and reduced wear-scar widths, which are attributed to the ordered molecular layers. The base stock’s molecular structure remained crucial for overall tribological performance in the presence of lubricant additives.