Acta Chimica Sinica ›› 2005, Vol. 63 ›› Issue (15): 1456-1460. Previous Articles     Next Articles



康凯1,阚成友*1,杜奕1,TAKEDA, Shinji2,刘德山1   

  1. (1清华大学化工系 北京 100084)
    (2 Hitachi Chemical Co. Ltd., Hitachi Ibaraki 317-8555, Japan)
  • 收稿日期:2001-12-31 修回日期:2005-04-08 出版日期:2005-08-15 发布日期:2010-12-10
  • 通讯作者: 阚成友

Study on Soap-Free Porous Latex Particles Containing High Amount of Carboxyl Groups

KANG Kai1, KAN Cheng-You*1, DU Yi1, TAKEDA Shinji2, LIU De-Shan1   

  1. (1 Department of Chemical Engineering, Tsinghua University, Beijing 100084)
    (2 Hitachi Chemical Co. Ltd., Hitachi Ibaraki 317-8555, Japan)
  • Received:2001-12-31 Revised:2005-04-08 Online:2005-08-15 Published:2010-12-10
  • Contact: KAN Cheng-You

The properties of functional polymer latex is closely related to its functional group amount. Crosslinked poly(methyl methacrylate-ethyl acrylate-methacrylic acid) [P(MMA-EA-MAA)] latex particles with different amount of carboxyl groups and with narrow size distribution were synthesized by seeded emulsion polymerization in the absence of surfactant materials, and soap-free porous latex particles with high amount of carboxyl groups were obtained after alkali post-treatment. Influences of MAA on polymerization, latex properties and porous morphology were investigated. The results showed that when 0.3 g of divinyl benzene was used as crosslinking agent, the crosslinking degree increased significantly from 28.26% to 90.95% with the increase of MAA amount from 4.0 mol% to 10.0 mol%, and this increase became slowly as MAA amount was more than 10.0 mol%; the particle volume expansion (ΔV) was increased gradually as MAA amount increased, and reached a maximum of 42.1% when 12.0 mol% of MAA was used, and perfect porous morphology inside particles was observed even when the crosslinking degree reached 95.4% at 14.0 mol% of MAA.

Key words: soap-free seeded emulsion polymerization, crosslinking agent, porous morphology, carboxylic acid amount