论文标题
生活聚合物网络的老化：具有斑点颗粒的模型
Aging of living polymer networks: a model with patchy particles
论文作者
论文摘要
微流变实验表明，由虫状胶束网络组成的粘弹性介质即使在微米的尺度上也显示出持续几秒钟的复杂弛豫。通过将带有合适的介类基本基序的斑块胶体模型映射到类似蠕虫的胶束系统中，我们能够在热淬火剂（跨越数十年的热淬火）下模拟其弛豫动力学，从微秒到几秒钟。将模型映射到真实单位并为实验性分割能量映射后，我们表明，放松过程通过一系列非本地和能量充满挑战的布置发展。这些调整消除了作为临时能量解决方案形成的不希望的结构，用于稳定网络的热力学不稳定的自由盖。我们声称，观察到的停滞过程的无标度性质可能使对实验相关时间尺度的正确定量作为魏森伯格数量复杂化。
Microrheology experiments show that viscoelastic media composed by wormlike micellar networks display complex relaxations lasting seconds even at the scale of micrometers. By mapping a model of patchy colloids with suitable mesoscopic elementary motifs to a system of worm-like micelles, we are able to simulate its relaxation dynamics, upon a thermal quench, spanning many decades, from microseconds up to tens of seconds. After mapping the model to real units and to experimental scission energies, we show that the relaxation process develops through a sequence of non-local and energetically challenging arrangements. These adjustments remove undesired structures formed as a temporary energetic solution for stabilizing the thermodynamically unstable free caps of the network. We claim that the observed scale-free nature of this stagnant process may complicate the correct quantification of experimentally relevant time scales as the Weissenberg number.
