Influence of particle diameter on the morphology of micron-sized, monodispersed composite polymer particles produced by seeded polymerization for the dispersion of highly monomer-swollen polymer particles |
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Authors: | M Okubo H Yonehara T Yamashita |
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Institution: | (1) Department of Chemical Science and Engineering Faculty of Engineering Kobe University, Rokko, Nada Kobe 657-8501, Japan e-mail: okubo@cx.kobe-u.ac.jp, JP |
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Abstract: | Micron-sized, monodispersed polystyrene (PS)/poly (n-butyl methacrylate) (PBMA) composite particles, in which the PS domain(s) were dispersed in a PBMA continuous phase, were
produced by seeded polymerization for dispersions of n-butyl methacrylate (BMA) swollen PS particles in a wide range of PS/BMA ratios in the presence of NaNO2 as a water-soluble inhibitor. Moreover, in order to change the diameter of the composite particles at same PS/BMA ratio,
PS/PBMA (1/150 w/w) composite particles were produced using five kinds of PS particles in a range of diameters from 0.64 to
3.27 μm as seeds. The percentages of the PS/PBMA composite particles having double and triple and over PS domains, which were
thermodynamically unstable morphologies, increased with the increase in the diameter of BMA swollen PS particles. There was
a clear influence of the size of the swollen particles on the morphology of the PS/PBMA composite particles produced.
Received: 30 September 1999/Accepted: 18 April 2000 |
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Keywords: | Dynamic swelling method Morphology Micron size Seeded polymerization Composite polymer particle |
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