Nanoparticles (NPs) distributed near the interface (in the droplets/matrix) and exactly at the interface are constructed in model polypropylene/polystyrene blends filled with different hydrophobic silica. It is found that the initially refined morphology of blends is stabilized under quiescent annealing by all NPs, especially for NPs exactly at the interface. However, the refined morphology in the shear flow is effectively stabilized by a small number of NPs near the interface, while it becomes exceedingly unstable with high concentrations of interfacial NPs due to the coalescence that resulted from shear-induced destruction of the brittle interface. In extensional flow, extensional thinning of blends is closely related to the NP concentration and the droplet deformation. Moreover, the droplet deformation is significantly promoted by NPs in the matrix but near the interface and low NP concentrations exactly at the interface, but it is obviously suppressed by high NP concentrations due to the brittle interface.

中文翻译：

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纳米粒子在不混溶混合物中的选择性分布：对静态退火、剪切和拉伸流中形态演变和流变学的影响

纳米颗粒 (NP) 分布在界面附近（在液滴/基质中）并恰好位于界面处，由填充有不同疏水性二氧化硅的模型聚丙烯/聚苯乙烯混合物构成。发现共混物的初始细化形态在所有 NP 的静态退火下稳定，特别是对于恰好在界面处的 NP。然而，剪切流中精细的形态被界面附近的少量 NPs 有效地稳定，而由于脆性界面的剪切诱导破坏导致聚结，它在界面 NPs 浓度高的情况下变得非常不稳定。在拉伸流动中，混合物的拉伸稀化与 NP 浓度和液滴变形密切相关。而且，