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Styrene miniemulsion polymerization stabilized by carboxylated polyurethane. II. Kinetics
Author(s) -
Yu ZhangQing,
Lee DougYoun,
Cheong InWoo,
Shin JinSup,
Park YoungJun,
Kim JungHyun
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11525
Subject(s) - miniemulsion , polymerization , polymer chemistry , styrene , emulsion polymerization , pulmonary surfactant , polyurethane , nucleation , materials science , chemistry , radical polymerization , chemical engineering , copolymer , organic chemistry , polymer , engineering , biochemistry
A styrene miniemulsion was prepared using carboxylated polyurethane as the sole costabilizer and sodium dodecyl sulfate as the surfactant. The effects of the amount of carboxylated polyurethane, the amount of the initiator and surfactant, the presence of a water‐phase inhibitor (sodium nitrite), and the reaction temperature on the kinetics of the miniemulsion polymerization were investigated. The evolution of the particle size during the polymerization was measured. The results show that the polymerization rate was proportional to the 0.21 power of the surfactant concentration and the 0.30 power of azobisisobutyronitrile. The droplet nucleation and homogeneous nucleation were found to be coexistent in the polymerization. The hydrophility of the particle surface plays a key role in the nucleation of the particle and, therefore, has an important effect on the kinetics of the polymerization. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1941–1947, 2003