Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (21): 2486-2494. Previous Articles     Next Articles

Full Papers

乙醇或乙醇-水为新的溶剂体系沉淀聚合制备单分散聚合物微球

顾相伶a,b    朱晓丽b    孔祥正*,b    张利娜b   谭业邦  鲁毅b   

  1. (a山东大学化学化工学院 济南 250100) (b济南大学化学化工学院 济南 250022)
  • 投稿日期:2009-03-26 修回日期:2009-05-27 发布日期:2009-06-30
  • 通讯作者: 孔祥正 E-mail:xzkong@ujn.edu.cn

Preparation of Polymer Uniform Microspheres via Precipitation Polymerization in Ethanol or Ethanol-Water water Mixture as New Solvent

Gu, Xiangling a,b    Zhu, Xiaoli b    Kong, Xiangzheng *,b    Zhang, Lina b    Tan, Yebanga   Lu, Yib   

  1. (a College of Chemistry and Chemical Engineering, Shandong University, Jinan 250100) (b College of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022)
  • Received:2009-03-26 Revised:2009-05-27 Published:2009-06-30

Uniform microspheres were prepared through precipitation polymerization of 1,1,1-tris(hydro- xymethyl) propane triacrylate (TMPTA)-Styrene styrene (St) with azobisisobutyronitrile (AIBN) as initiator in ethanol and ethanol-water mixture, new solvent systems with low toxicity. Impacts of TMPTA amounts, initiator concentrations and water content in the solvent mixture were studied. Uniform microspheres were obtained within 4 h along with higher monomer conversion. Results demonstrated clearly that increase of initiator amounts and use of water as a cosolvent were indeed very effective to promote the polymerization to high conversions and to get uniform microspheres. With no water under otherwise the same experimental conditions, only about 79% of monomer conversion was detected; while monomer conversion was remarkably increased to 95% when 28 vol% of water was added into ethanol. To reach to this high conversion with no water in the medium, 6 wt% of AIBN was needed. Mechanisms of microsphere formation and methods to promote monomer conversion were also explained.

Key words: precipitation polymerization, 1,1,1-tris(hydroxymethyl) propane triacrylate, uniform microsphere