Abstract
Linear crystallization velocities of hydrates (aqueous clathrates) of type I ethylene oxide and type II tetrahydrofuran were determined in simple solutions and polyacrylamide gels supercooled from 3.1 to 24 °C. At any given degree of supercooling, all hydrate-forming solutions crystallized much more slowly than pure water, and the hydrate of tetrahydrofuran crystallized more slowly than the hydrate of ethylene oxide. Ethylene oxide hydrate formed at a velocity greater than tetrahydrofuran hydrate even when the solutions were designed to bind approximately equal numbers of water molecules during hydrate formation. In all instances, the presence of polyacrylamide gel decreased the velocity of hydrate formation.
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