Tetsuya Yamamoto, K. Kawaguchi, Yuya Takahashi
Aug 5, 2016
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0
Influential Citations
19
Citations
Journal
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Abstract
Abstract The soap-free emulsion polymerization of styrene by an oil-soluble initiator, 2,2′-azobis(2-methylpropionitrile) (AIBN), with a water-soluble initiator, 4,4′-azobis(4-cyanovaleric acid) (V-501), was conducted in water to control the size of the synthesized polymeric particles. The particle size and surface potential were monitored as concentration of V-501 used for the polymerization was varied. When the V-501 concentration was increased, the particle size increased because V-501 was a weak acid and reduced the surface potential, thereby promoting particle growth through coagulation. Additionally, V-501 can also function as a radical initiator, increasing the efficiency of the polymerization reaction and, thus, the number concentration of the particles.