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Nano-Rheology of Single Unentangled Polymeric Lubricant Films

机译：单纠缠高分子润滑膜的纳米流变学

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Rheology and tribology become more and more critical issues in order to satisfy the harsh requirements for ultra-small head/media spacing HDDs. In this communication, MD simulations with a bead/spring model were employed to examine the nano-rheological response of nonfunctional and functional PFPEs by analyzing the shear viscosity of nanoscale PRE films and the relaxation processes as a function of wall interaction/separation and endgroup functionality. Our simulation results indicate that thin PRE films show more solid-like behavior, especially under high shear rate. The film deformation and shear viscosity change by tuning the film thickness and the endgroup functionality was discussed in conjunction with the relaxation processes.
机译：为了满足超小型磁头/介质间距硬盘的苛刻要求，流变学和摩擦学成为越来越关键的问题。在此交流中，通过使用珠/弹簧模型的MD模拟，通过分析纳米级PRE膜的剪切粘度和松弛过程与壁相互作用/分离和端基官能团的关系，研究了非功能性和功能性PFPE的纳米流变响应。 。我们的模拟结果表明，薄的PRE膜表现出更多的固体行为，尤其是在高剪切速率下。结合松弛过程，讨论了通过调整膜厚和端基官能度来改变膜的变形和剪切粘度。

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