Wormlike micelles (WLMs) are ubiquitous viscoelastic modifiers that share properties with polymer solutions. While their macroscopic rheology is well-understood, their microscopic dynamics remain difficult to measure because they span a large range of time and length scales. In this work, we demonstrate the use of X-ray photon correlation spectroscopy to interrogate the segmental dynamics of inverse WLM solutions swollen with a rubidium chloride solution. We observe a diffusive scaling of the dynamics and extract a temperature-dependent diffusion coefficient, which we associate with the thermal interactions of the slow segmental dynamics near entanglement points. We probe this relaxation process across the unbranched to branched topological transition and find no microstructural evidence of branch formation in the slow mode. Instead, we observe that the dynamics become more homogeneous and prominent as the temperature is reduced and water content increases.

中文翻译：

---

使用 X 射线光子相关光谱法探测的反蠕虫状胶束的微观动力学

蠕虫状胶束 (WLM) 是普遍存在的粘弹性改性剂，与聚合物溶液具有相同的特性。虽然它们的宏观流变学已广为人知，但它们的微观动力学仍然难以测量，因为它们跨越了大范围的时间和长度尺度。在这项工作中，我们展示了使用 X 射线光子相关光谱来询问用氯化铷溶液溶胀的逆 WLM 溶液的分段动力学。我们观察到动力学的扩散尺度并提取与温度相关的扩散系数，我们将其与纠缠点附近的慢分段动力学的热相互作用相关联。我们在未分支到分支的拓扑转换中探索了这种松弛过程，并没有发现慢模式下分支形成的微观结构证据。反而，