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Journal of Dispersion Science and Technology Volume 31, 2010 - Issue 11
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Original Articles

Ostwald Ripening of Two-Component Disperse Phase Miniemulsions Containing Monomer and Reactive Costabilizer

Y. Meliana Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.
,
N. A. Cala Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.
,
C. T. Lin Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.
&
C. S. Chern Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.Correspondence[email protected]
Pages 1568-1573 | Received 16 Jul 2009, Accepted 16 Aug 2009, Published online: 05 Nov 2010
 
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Abstract

The Ostwald ripening behavior of the two-component miniemulsions of MMA/SMA, ST/SMA, MMA/LMA, and ST/LMA was investigated. Kabal'nov equation predicted the Ostwald ripening rate data reasonably well when the volume fraction of reactive costabilizer was lower than 0.02–0.03, but it failed to describe the experimental data over the whole costabilizer volume fraction range (0.01–0.05). An empirical equation with two adjustable parameters K1 and K2 was then proposed to adequately predict the Ostwald ripening rate data. The greater the value of K1 (or K2), the more effective is the costabilizer in stabilizing miniemulsion droplets against the diffusional degradation process.

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