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Growth and Inhibition of Ethylene Oxide Clathrate Hydrate
Author(s) -
LARSEN ROAR,
KNIGHT CHARLES A.,
RIDER KEVIN T.,
SLOAN E. DENDY
Publication year - 2000
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2000.tb06799.x
Subject(s) - clathrate hydrate , ethylene oxide , hydrate , subcooling , methane , ethylene glycol , chemistry , ethylene , oxide , crystal growth , dodecahedron , materials science , chemical engineering , crystallography , organic chemistry , copolymer , engineering , catalysis , boiling , polymer
A bstract : Growth and inhibition of single crystals of ethylene oxide clathrate hydrate provide experimental accessibility to similar phenomena in methane clathrate hydrates. Ethylene oxide hydrate single crystals were grown in a simple experimental setup. The crystals grew from the subcooled melt as rhombic dodecahedra, macroscopically exhibiting {110} as the slowest growing faces. The addition of minute amounts of poly(N‐vinylcaprolactam) (PVCap) or a random terpolymer of PVCap, poly(N‐vinylpyrrolidone), and dimethylaminoethylmethacrylate (VC‐713) caused small‐scale branching of crystals, but with a seemingly uniform crystal orientation. A few tenths of a weight percent of these additives caused complete crystal growth inhibition at several degrees of subcooling.