TY - JOUR
T1 - Phase separation phenomena during the formation of asymmetric membranes
AU - Koenhen, D.M.
AU - Mulder, M.H.V.
AU - Smolders, C.A.
PY - 1977
Y1 - 1977
N2 - The formation of membranes from two systems has been studied. In the system polyurethane-dimethylformamide-water, the mechanism for the formation of the sponge-like structure proves to be a liquid-liquid phase separation with nucleation and growth of the diluted phase. This mechanism has been confirmed for the system modified polystyrene-polyisoprene-polystyrene/o-dichlorobenzene/(methanol-water). Crystallization and gelation is discussed. The membranes prepared showed hyperfiltration activity. The mechanism proposed here is believed to be valid for other systems, too.
AB - The formation of membranes from two systems has been studied. In the system polyurethane-dimethylformamide-water, the mechanism for the formation of the sponge-like structure proves to be a liquid-liquid phase separation with nucleation and growth of the diluted phase. This mechanism has been confirmed for the system modified polystyrene-polyisoprene-polystyrene/o-dichlorobenzene/(methanol-water). Crystallization and gelation is discussed. The membranes prepared showed hyperfiltration activity. The mechanism proposed here is believed to be valid for other systems, too.
KW - IR-70801
U2 - 10.1002/app.1977.070210118
DO - 10.1002/app.1977.070210118
M3 - Article
VL - 21
SP - 199
EP - 215
JO - Journal of applied polymer science
JF - Journal of applied polymer science
SN - 0021-8995
IS - 1
ER -