Regular micro-porous polymeric membranes have recently been discovered by
rapidly evaporating a solution of CS2 containing
poly(p-phenylene)-block-polystyrene [#!ref1!#]. 1,2-dichloroethane (a chlorated
solvent in which polystyrene gel phase has never been observed) is also found to
produce ordered structures, which definitively excludes eventual effect of the
gelation process during the membrane ... hiện toàn bộ