Phase Analysis of the Cellulose Triacetate-Nitromethane System
Figure 5
(a) Phase diagram of the cellulose triacetate-nitromethane system: squares denote the data of polarization microscopy, the circles are from the turbidity spectrum method (dark ones: extrapolation by method 1 and that of the right-hand branch by method 2; open: extrapolation by method 1 and that of the left-hand branch by method 2), and the triangles mean DTA; (1), (2) the binodal (the solid line) and spinodal (the dashed line), approximated and calculated, respectively, from Flory-Huggins’ theory with experimentally found compositions of the coexisting phases, (3) the liquidus, (4) the vitrification curve. The dashed area depicts the concentration-temperature range of LC state existence. Insets: the system’s morphology in polarized light (see text for explanation). (b) Temperature dependence of the calculated Huggins interaction parameter .
