This work presents the molecular dynamics of both fully amorphous and semicrystalline poly(butylene 2,5-furanoate) (PBF). Broadband dielectric spectroscopy experiments were combined with temperature modulated differential scanning calorimetry measurements. The results showed that the subglass molecular dynamics is characterized by the existence of two dielectric relaxation processes, being the faster one associated to the glycolic subunit, whereas the slower relaxation was assigned to the link in between the ester group and the furan ring. Crystallization affected differently the contribution of these two components. Additionally, crystallization had a stronger effect on the α relaxation process, related to the segmental dynamics of the amorphous phase. In the semicrystalline state, the PBF amorphous phase was described as being composed by different fractions, including a completely rigid one, with distinctly slower mobilities and reduced contributions to the dielectric relaxation, compared to the fully amorphous polymer.

这项工作提出了完全无定形和半结晶聚（2，5-呋喃丁酸丁二醇酯）（PBF）的分子动力学。宽带介电谱实验与温度调制差示扫描量热法测量相结合。结果表明，亚玻璃分子动力学的特征是存在两个介电弛豫过程，其中一个较快的过程与乙醇酸亚基有关，而较慢的弛豫过程被赋予酯基和呋喃环之间的连接。结晶对这两个成分的贡献有不同的影响。另外，结晶对α弛豫过程有更强的影响，这与非晶相的分段动力学有关。在半结晶状态下