TEMPO-mediated dispersion polymerization of styrene in the presence of camphorsulfonic acid

被引:18
|
作者
Oh, S [1 ]
Kim, K [1 ]
Lee, BH [1 ]
Shim, SE [1 ]
Choe, S [1 ]
机构
[1] Inha Univ, Dept Chem Engn, Inchon 402751, South Korea
关键词
camphorsulfonic acid; nitroxide-mediated dispersion polymerization; polystyrene microsphere;
D O I
10.1002/pola.20988
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The TEMPO-mediated polymerization of styrene in the presence of camphorsulfonic acid (CSA) is carried out using controlled radical dispersion polymerization. In the absence of TEMPO and CSA, 92% of conversion was achieved within 3 h of polymerization. When TEMPO is solely used, broadening of particle size with narrow PDI was observed because of the prolonged polymerization time. However, when 1:1 molar ratio of CSA/TEMPO was added, the fairly monodisperse PS microspheres having 5.83 mu m average size and 3.42% C-V (coefficient of variation) were successfully achieved because of the narrow molecular weight of intermediate oligomers and shortening of the polymerization time. This result obviously indicates that the addition of CSA in TEMPO-mediated dispersion polymerization not only shortens the polymerization time but also greatly improves the uniformity of the microspheres. (c) 2005 Wiley Periodicals, Inc.
引用
收藏
页码:62 / 68
页数:7
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