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http://dx.doi.org/10.17702/jai.2012.13.3.101

Preparation of Monodisperse Submicron-Sized Polymeric Particles by Emulsifier-Free Emulsion Polymerization  

Lee, Ki-Chang (Department of Polymer Science and Engineering, School of Nano and Advanced Materials Engineering, Gyeongsang National University)
Publication Information
Journal of Adhesion and Interface / v.13, no.3, 2012 , pp. 101-108 More about this Journal
Abstract
Narrowly dispersed poly(BMA-co-MMA) and PBMA latices (PSD : 1.002~1.008) were synthesized successfully by surfactant-free emulsion polymerization with 2,2' azobis(2-methyl-propionamidine) dihydrochloride (AIBA) and $K_2S_2O_8$ (KPS). The number average particle diameter and the number average molecule weight were found to be 160~494 nm and (1.25~7.55) ${\times}10^4$, respectively. The influences of BMA/MMA ratio, monomer and initiator concentrations, addition of DVB/EGDMA crosslink agent, and polymerization temperature on the polymerization rates and on the particle size and molecular weight were studied. The rate of polymerization increased with increasing MMA concentration in BMA/MMA weight ratio. The particle diameter as well as the polymer molecular weight could be controlled easily by controlling the BMA/MMA weight ratio, monomer concentration, AIBA and KPS concentration, and polymerization temperature.
Keywords
surfactant-free emulsion polymerization; AIBA and KPS; particle size and molecular weight; monodisperse poly(BMA-co-MMA) and PBMA latices;
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