Salt Effects on the Phase Behavior and Cocrystallization Kinetics of POCB–Water Mixtures
Salt Effects on the Phase Behavior and Cocrystallization Kinetics of POCB–Water Mixtures
复制标题
盐对 POCB-水混合物的相行为和共结晶动力学的影响
作者：
Michael Gresh;Sudesna Banerjee;Tara Y Meyer;Sachin S Velankar
水与聚氧杂环丁烷（POCB）的混合物具有独特的相图，其结合了高温下的液-液平衡（LLE）和低温下POCB-水合物的共结晶。这种共晶水合物的形成在聚合物中是极其罕见的。本文研究了NaCl盐对POCB-水混合物相行为的影响，并研究了POCB-水混合物水合物结晶动力学。发现小于0.1重量%的盐负载大大扩展了液液平衡区域。发现在无盐条件下，0.10wt%的盐负载量显著降低水合物的熔融温度低于其0.37 °C值。水合物被发现是显着的耐盐性，并持续在室温下，即使当与盐饱和的水平衡。发现盐减缓水合物结晶，并且减缓的程度大于由于熔点降低而导致的盐诱导的过冷度降低的预期。
Mixtures of water with polyoxacyclobutane (POCB) have a unique phase diagram which combines liquid–liquid equilibrium (LLE) at high temperatures and cocrystallization of a POCB-hydrate at low temperatures. Such cocrystal hydrate formation is extremely rare among polymers. We report on the effects of adding NaCl salt on the phase behavior of POCB–water mixtures and the kinetics of hydrate crystallization from such mixtures. Salt loadings of less than 0.1 wt % were found to greatly expand the LLE region. Salt loadings of ∼10 wt % were found to significantly decrease the melting temperature of the hydrate below its ∼37 °C value under salt-free conditions. The hydrate was found to be remarkably tolerant of salt and persists at room temperature even when equilibrated with salt-saturated water. Salt was found to slow down hydrate crystallization, and the degree of slowing was greater than that expected from the salt-induced decrease in undercooling due to melting point depression.
影响因子：
3.7
作者：
Zhang, Yanjie;Furyk, Steven;Cremer, Paul S.
通讯作者：
Cremer, Paul S.
影响因子：
5
作者：
Emily F. Barker;S. Banerjee;T. Meyer;S. Velankar
通讯作者：
Emily F. Barker;S. Banerjee;T. Meyer;S. Velankar
LLE 中的聚合物共结晶：POCB 水合物从 POCB 和水的两相混合物中的结晶动力学
影响因子：
4.6
作者：
Banerjee, Sudesna;Gresh-Sill, Michael;Barker, Emily F.;Meyer, Tara Y.;Velankar, Sachin S.
通讯作者：
Velankar, Sachin S.