Polystyrene optical flow birefringence

Figure 13.40 Optical flow birefringence studies of400 kDa polystyrene in Aroclor 1248 at concentrations (a) 9.09, and (b) 105 g/1, based on measurements of Lodge and Schrag(50). Results in the original paper were replotted from magnitude-phase angle representation to the in-phase, out-of-phase representation permitting direct comparison of the results above with the mechanical dynamic moduli. In (b) the vertical axis is a log scale covering 17 orders of magnitude.

Figure 2. Experimentally determined flow-induced birefringence vs. strain rate for atactic polystyrene. The maximum value of birefringence is 1.15 x 10, which corresponds to an optical retardation of 27 nm for a cell depth of 1.8 mm 0.1% solution. Mu, 5.5 X 10 in decahydronaphthalene).

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