As an incipient but preeminent technology for multiphase nanomaterials/fluids, exact compatibilizing mechanisms of Janus particles in polymer blends and the consequent morphology remain unknown. The contributions of Janus nanorods to slip suppression and momentum transfer across the interface have been explored through dissipative particle dynamics simulations under shear flow at unentangled polymer–polymer interfaces. Rods have been then grafted with flexible polymer chains to unveil interfacial structure–property relationships at a molecular level when compared with flexible diblock copolymer surfactants. When Janus rods are sparsely grafted with necessarily longer grafts, they favor a greater degree of graft interpenetration with polymer phases. This yields less effective momentum transfer that impacts droplet coalescence processes; dynamic heterogeneities at complex interfaces; and helps map their efficiency as compatibilizers.

中文翻译：

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Janus杆在聚合物界面介导的滑移和动量传递机制。

作为多相纳米材料/流体的一项新兴技术，但Janus颗粒在聚合物共混物中的确切相容性机理以及随之而来的形态仍然是未知的。通过在无缠结的聚合物-聚合物界面处的剪切流下的耗散粒子动力学模拟，探索了Janus纳米棒对界面的滑移抑制和动量传递的贡献。然后，将棒与柔性聚合物链接枝，以与柔性二嵌段共聚物表面活性剂相比，揭示分子水平上的界面结构与性质的关系。当将Janus杆稀疏地嫁接成必须更长的嫁接物时，它们会促进嫁接物与聚合物相的互穿程度更高。这会产生不太有效的动量传递，从而影响液滴的聚结过程。复杂接口处的动态异质性；并帮助绘制其作为增容剂的效率。