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| Title
| - Studies on Semibatch Microemulsion Polymerization of Butyl Acrylate: Influence of the Potassium Peroxodisulfate Concentration
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| Abstract
| - Semibatch microemulsion polymerization of butyl acrylate in the presence of sodium dodecylsulfate/Aerosol OT surfactant mixture and potassium peroxodisulfate as initiator is analyzed with respectto particle nucleation and growth. It is concluded that particle nucleation occurs during the whole batchand semibatch polymerization periods also in the absence of micelles. The observed increase in the polymercontent compared to the batch microemulsion polymerization is mainly due to nucleation of new particlesduring the semibatch stage. During the post-addition polymerization period particle growth is dominatedby particle coalescence. The particular method of semibatch microemulsion polymerization allows to obtainlatexes with particle sizes below 40 nm (dynamic light scattering intensity weighted diameter) at polymerconcentrations near to 30 wt % and stabilizer amounts between 5 and 6% relative to the polymer mass.
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