Figure 4
Shear-SALS patterns at (a) = 0 and (b) 0.23 s−1 and (c) shear-OM image for Solution 2. The model (d) schematically presents the `solvent-squeeze', as illustrated by the blue arrows, from polymer-rich regions represented by the blue region to polymer-poor regions represented by the bright matrix to account for building up (e) the PLWCF with its wavevector parallel to the x axis. The dark dots in (d) schematically display some solvent molecules and the blue regions in (e) represent polymer-rich regions. The patterns on the right side and top side of (e) schematically represent the spatial CF along the x axis and z axis, respectively. The pattern (e) corresponds to that obtained by zooming out of the pattern (d). In (a) the bright part around the incident beam stop (a dark circle) is an artefact due to a portion of stray incident beam. The snapshots (b) and (c) were taken with shutter speeds of 10−3 and 10−4 seconds per frame, respectively. |