Phase change marking, optical data

As pointed out by Brevet and Girault [17], this analysis shows that the discussion of SHG data from liquid/liquid interfaces must be cognisant of the possible contributions from the bulk and from field gradients at the interface. However, in the liquid/liquid case, the changes in optical constants from one bulk phase to the other will normally be less marked than that observed in airAiquid experiments. Of course in the limit of the same optical constants for the two phases, there would be no gradient effects but there would also be no reflection. 

A ratio of parameters determined from the scattering data was calculated and shown to vary very markedly with changes in the temperature of crystallisation [111]. This parameter, which was a ratio of rates of change of scattering intensities for two optical configurations and was a measure of relative rates of crystallisation and phase separation, had a value of unity (Fig. 36) at values of T<- above 35 °C for PCL/SAN-26.4 (M = 168,000, M =2.21),60 wt % PCL, as it did for... 

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