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http://dx.doi.org/10.7473/EC.2011.46.1.060

Morphology of Poly(butyl acrylaye)/Poly(methyl methacrylate) Composite Latex Prepared by 2-stage Dispersion Polymerization  

Lee, Ki-Chang (Department of Polymer Sci. & Eng., Engineering Research Institute, Gyeongsang National University)
Choe, Hyeon-Seong (Department of Polymer Sci. & Eng., Engineering Research Institute, Gyeongsang National University)
Publication Information
Elastomers and Composites / v.46, no.1, 2011 , pp. 60-69 More about this Journal
Abstract
The various types of PBA/PMMA composite latexes were prepared by $2.1\;{\mu}m$ PBA seeded batch and seeded semi-continuous dispersion polymerization. The morphology of the PBA/PMMA composite latexes by seeded batch process was found to be closely dependant on the weight ratios of methanol/water in polymerization medium and of PBA seed/MMA at the second stage. In general, egg, snowman, confetti, peanut-like nonspherical composite latex particles were formed with increasing amount of water and MMA as a result of the occurrence of the phase separation between PBA seed and PMMA. The morphology of the PBA/PMMA composite latexes by seeded semi-continuous process was controlled by the addition time of MMA, especially, spherical shaped core(PBA)/shell(PMMA) composite latex particles were prepared under the monomer-starved condition at the second stage.
Keywords
seeded batch and seeded semi-continuous dispersion polymerization; methanol/$H_2O$ medium ratio; PBA seed/MMA ratio; morphology of PBA/PMMA composite latex particles; monomer-starved state;
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