Monodisperse ultrafine polystyrene nanoparticles prepared by a semicontinuous microemulsion polymerization |
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Authors: | Xuanfeng Kong Qian Wu Wancheng Hu Zhaoqun Wang |
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Institution: | Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China |
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Abstract: | Monodisperse ultrafine polystyrene nanoparticles have been successfully prepared under low levels of surfactant through a novel semicontinuous microemulsion polymerization, in which the first part of monomer (St1) is added dropwise while the subsequent supply to the polymerizing system is delivered in one potion. Polystyrene nanoparticles with number‐average diameter of 17.4 nm and polydispersity index of 1.06 were obtained using low level of surfactant/monomer weight ratio of 0.20. Influencing of parameters including amount of St1, solid content, initiator, reaction temperature, and cosurfactant on the resultant particle size and size distribution were investigated. The mechanism of nucleation and particle growth was discussed as well. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 4522–4528, 2008 |
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Keywords: | microemulsion polymerization nanoparticles particle nucleation particle size polystyrene |
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