反应详情

温度

75 °C

In a 250 mL Morton flask (fitted with mechanical stirrer, thermometer, and oil bath heating) under argon atmosphere were combined 4-styrenesulfonic acid sodium salt hydrate (0.10 g), t-butylacrylamide (Aldrich, 9.9 g), α-olefin sulfonate surfactant (Rhodia, Rhodacal A-246/L, 12.5 g of a ca. 40% aqueous solution), and water (175 g). The mixture was stirred and heated in a 90° C. oil bath until an internal temperature of ca. 75° C. was obtained, and then solid initiator (K2S2O8, Aldrich, 0.20 g) was added all at once. The appearance of the aqueous monomer slurry changed quickly over a period of 1-4 minutes, with the solid dissolving to form a nearly transparent, bluish scattering emulsion. The mixture was stirred and heated in a 100° C. oil bath for an additional 2 h (internal temperature of 93° C.) to decompose the excess initiator. The mixture was cooled with stirring, and filtered to remove any suspended solid. Yield 196.2 g of emulsion, pH ca. 3 to pH paper, 8.07% solids, particle size=9.3 nm Rh, by DLS, (2nd cumulant analysis PDI=0.10).

1. customIn a 250 mL Morton flask (fitted with mechanical stirrer
2. temperaturethermometer, and oil bath heating) under argon atmosphere
3. customwas obtained
4. additionsolid initiator (K2S2O8, Aldrich, 0.20 g) was added all at once
5. dissolutiondissolving
6. customto form a nearly transparent,
7. stirringThe mixture was stirred
8. temperatureheated in a 100° C. oil bath for an additional 2 h (internal temperature of 93° C.)
9. temperatureThe mixture was cooled
10. stirringwith stirring
11. filtrationfiltered
12. customto remove any suspended solid