Abstract
Monodisperse model polymer colloids stabilized with strongly ionized, hydrolysis-resistant surface groups are formed without emulsifying or stabilizing additives when a complexed form of cupric or silver ion is used as oxidant to produce free radical initiator from sulfite ion. It is believed that the surface groups are sulfonate ions. In one case (latex 46), the surface charge of 17.6 μC/cm 2 was unchanged in the acid form after heating 24 hr/95°C. In another case (latex 39D), the yield was 86% with a particle size standard deviation of 5%. An experimental design was used to study selected variables in preparing styrene colloids with redox systems based on silver ammine complex or cupric cyanide complex. It revealed a strong effect of redox capacity, A, and an interaction of A with the level of complexing agent.
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