Abstract Using a single experimental approach, namely dynamic light scattering in polyacrylamide and fibrin gels, the fluctuation dynamics of polymer gels was studied for the first time in parallel at two scales. One scale is congruent with gel network macrostructure, and another is microscopic at this level. Long-period fluctuations of the network structure with characteristic times in the range ~10–70 min have been detected, during which the microdynamics of network fibers remains practically unchanged in the range 0.1–10 6 μs. The limits of applicability of the “frozen” inhomogeneities approximation widely used in studying gels microdynamics have been established. The approach developed forms a basis for extending the range of investigations of polymer gel dynamics.

中文翻译：

---

聚合物凝胶的多尺度波动动力学

摘要 采用单一实验方法，即聚丙烯酰胺和纤维蛋白凝胶中的动态光散射，首次在两个尺度上并行研究了聚合物凝胶的波动动力学。一种尺度与凝胶网络宏观结构一致，另一种尺度在这个层面上是微观的。已经检测到网络结构的长周期波动，特征时间在~10-70 分钟范围内，在此期间，网络纤维的微动力学在 0.1-10 6 μs 范围内几乎保持不变。已经确定了广泛用于研究凝胶微动力学的“冻结”不均匀性近似的适用性限制。所开发的方法形成了扩展聚合物凝胶动力学研究范围的基础。