Brij 92/96 mixtures solubilization

Relative viscosity measurements for 1% Brij 96/92 mixtures as a function of temperature and of 96/92 ratio are shown in Figure 4. The 100% Brij 9 6 sample rose to a value of 2.34 at 66.(Pc which is just below its cloud point of 68.5 G. The solubilization of 5% Brij 92 lowered the cloud point to 59.5 C. Relative viscosities of the mixture were larger, reaching 5.7 at 57.5 C, two degrees below the visually-determined cloud point. 

Mixtures of Brij 96 and Brij 92 in water, in which the latter was solubilized by the former up to 157o, gave lower cloud points and higher... 

Inverse Emulsion Polymerization Acrylamide in Near-Criticai and Supercritical Fluid Conditions. Supercritical fluids exhibit both hquid-hke properties (eg, solubilizing power), and gas-like properties (eg, low viscosities). Aqueous AMD has been dispersed and even microemulsified in near-supercritical ethane-propane mixtures using nonionic surfactants such as ethoxylated alcohols (eg, Brij 30 and Brij 52). Emulsion polymerization of AMD was then conducted at 60°C for 5 h and 379 bar, at the near-supercritical condition of certain ethane-propane mixtures (189). 2,2 -Azobis(isobut5T onitrile) (AIBN) was used as the initiator. The resulting poly(acrylamide) had a low molecular weight in the range of (2.7-5.8) X 10 Da. The ethane and propane can be easily recovered and recycled in a production plant. 

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