%0 Journal Article
%A Frielinghaus, H.
%A Hermsdorf, N.
%A Sigel, R.
%A Almdal, K.
%A Mortensen, K.
%A Hamley, I. W.
%A Messé, L.
%A Corvazier, M. F.
%A Ryan, A. J.
%A van Dusschoten, D.
%A Wilhelm, M.
%A Floudas, G.
%A Fytas, G.
%T Blends of AB/BC diblock copolymers with a large interaction parameter Chi
%J Macromolecules
%V 34
%@ 0024-9297
%C Washington, DC
%I Soc.
%M PreJuSER-34172
%P 4907 - 4916
%D 2001
%Z Record converted from VDB: 12.11.2012
%X Blends of poly(styrene)-b-poly(isoprene) (PS-PI) and poly( isoprene)-b-poly(ethylene oxide) (PI-PEO) were investigated by small-angle X-ray scattering, photon correlation spectroscopy, light microscopy, and rheology. Blends were prepared in which both diblocks had the same PI composition, f, and were investigated as a function of blend composition, Phi. We generally found a disordered one-phase region at high temperatures and two macrophase-separated, ordered phases at low temperatures. At low temperatures the only appreciable miscibility was found for f = 0.7 in the PI-PEO-rich phase. At intermediate temperatures we generally observed macrophase separation before microphase separation upon cooling. The macrophase separation boundary compared to the microphase boundary is lowered upon increasing f. For f = 0.6 and 0.7 we observe an adjustment of the d spacing of the macrophase-separated, ordered phases. The general trend of the phase behavior is described by a theory using the random phase approximation.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000169564100036
%R 10.1021/ma010233q
%U https://juser.fz-juelich.de/record/34172