Acta Chimica Sinica ›› 2005, Vol. 63 ›› Issue (15): 1444-1448. Previous Articles     Next Articles

Original Articles



  1. (北京大学化学与分子工程学院 北京 100871)
  • 投稿日期:2004-10-15 修回日期:2005-04-07 发布日期:2010-12-10
  • 通讯作者: 翟茂林

Radiation Grafting of Binary Monomers onto Cotton Cellulose

YAN Yu, YI Min, PENG Jin-Fen, ZHAI Mao-Lin*, HA Hong-Fei   

  1. (College of Chemistry and Molecular Engineering, Peking University, Beijing 100871)
  • Received:2004-10-15 Revised:2005-04-07 Published:2010-12-10
  • Contact: YAN Yu

Radiation-induced grafting of binary vinyl monomers of styrene (St)/maleic anhydride (MAn), St/dimethylamino ethyl methacrylate (DMAEMA) and St/vinyl acetate (VAc) onto cotton cellulose was carried out by γ-radiation from a 60Co source at room temperature under nitrogen. The effect of the concentration of initial comonomer, the molar ratio of both monomers in the grafting solution, etc., on the grafting yield was investigated, and the effects of the reactivity ratio of two monomers on the grafting yield, the composition and characteristic of the grafted copolymers were discussed. The results suggested that the decisive factor of the composition of the grafted copolymers was the reactivity ratio and the molar ratio of two monomers, which was testified further by the analyses of the IR and TGA. X-ray diffraction analysis showed that the crystallinity was reduced with the increase of the grafting yield, which proved that the grafting of binary comonomers onto cotton cellulose extended from the third phase to the crystallized region.

Key words: styrene, maleic anhydride, dimethylamino ethyl methacrylate, vinyl acetate, cotton cellulose, radiation-induced grafting, reactivity ratio