2 research outputs found
Liquids That Freeze When Mixed: Cocrystallization and Liquid–Liquid Equilibrium in Polyoxacyclobutane–Water Mixtures
We show that liquid
polyoxacyclobutane −[CH<sub>2</sub>–CH<sub>2</sub>–CH<sub>2</sub>–O]<sub><i>n</i></sub>– when mixed
with water at room temperature precipitates solid
cocrystals of the polymer and water. Cocrystals can also be formed
by simply exposing the liquid polymer to saturated humidity. This
appears to be the only known example of nonreacting liquids combining
to form a solid cocrystal, also known as a clatherate, at room temperature.
At high temperatures, the same polymer–water mixtures phase
separate into two coexisting liquid phases. This combination of cocrystal
formation and LCST-type liquid–liquid equilibrium gives rise
to an unusual, possibly unique, type of phase diagram