By applying an isoconversional method to differential-scanning calorimetry (DSC) data, we have discovered that the addition of LiBF₄ significantly affects the activation energy E_α of the glass transition of 1,2-propanediol. Depending upon its concentration, the dynamics of the glass transition are affected more by adding LiBF₄ at an early stage of the glass-to-liquid transition rather than at later stages. As the mole fraction x of LiBF₄ increases, the value of E_α initially increases, but it decreases dramatically during the glass transition. The abrupt decline in E_α suggests that the addition of LiBF₄ breaks cooperative rearranging motions into smaller parts. The expansion of cooperativity, and its fragmentation with increasing temperature, can be explained in terms of competition between the hydrogen-bond networks of the alcohol solvent and the ionic interactions due to the added salt. The variability of E_α with temperature is found to correlate exponentially with the dynamic fragility.

中文翻译：

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LiBF ₄的添加对1,2-丙二醇的玻璃化动力学的影响

通过施加等转化率的方法来差分扫描量热法（DSC）的数据，我们已经发现，在加入的LiBF的₄显著影响活化能Ë _α 1,2-丙二醇的玻璃化转变的。取决于其浓度，在玻璃-液体转变的早期而不是在后期，加入LiBF _4会更多地影响玻璃转变的动力学。作为摩尔分数X的的LiBF ₄的增加，的值ê _α最初增加，但是它的玻璃化转变期间显着降低。在急速下滑Ë _α表明，添加的LiBF的₄将协作重排动作分解为较小的部分。协同作用的扩展及其随温度升高而断裂的现象，可以用醇溶剂的氢键网络之间的竞争和由于添加盐引起的离子相互作用来解释。的可变性ë _α与温度被发现与动态脆性指数地相关。