With the help of Broadband Dielectric Spectroscopy, it has been possible to study the molecular dynamics of disentangled Ultra High Molecular Weight Polyethylene in a wide temperature and frequency range. Catalytic ashes of aluminum oxide act as dielectric probes, allowing the identification of five different processes: an α_c-process due to movements in the crystalline phase, two γ-processes attributed to amorphous chain portions close to the crystalline lamellae, and two β-processes that we have attributed to the disentangled and entangled amorphous phases. The entanglement formation has been followed by isothermal runs and a model that predicts the energy spent to form entanglements as a function of time and temperature is thereby proposed. This model allowed us to calculate the associated activation energy of the entanglement process.

Our work advances further the understanding of entanglement dynamics of ultra-high molecular weight polymers, and the proposed model could prove useful to describe other similar processes such as cross-linking.

借助宽带介电谱，可以在宽的温度和频率范围内研究解缠的超高分子量聚乙烯的分子动力学。的氧化铝充当介电探头催化灰烬，允许五个不同的进程的识别：一个α _Ç-由于结晶相中的运动而产生的β-过程，两个γ-过程归因于靠近结晶薄片的无定形链部分，以及两个β-过程，我们将其归因于解缠结和纠缠的无定形相。纠缠形成之后是等温运行，因此提出了一个模型，该模型预测了形成纠缠所花费的能量随时间和温度的变化。该模型使我们能够计算纠缠过程的相关活化能。

我们的工作进一步提高了对超高分子量聚合物纠缠动力学的理解，并且所提出的模型可以证明对描述其他类似过程（例如交联）很有用。