应用化学 ›› 1998, Vol. 0 ›› Issue (1): 113-115.

• 研究论文 • 上一篇    下一篇

铬酸引发丙烯腈与苎麻纤维接枝共聚反应

肖超渤, 任绍志, 吴力立   

  1. 武汉大学化学系 武汉 430072
  • 收稿日期:1997-04-07 修回日期:1997-09-10 出版日期:1998-02-10 发布日期:1998-02-10

Chromic Acid Initiated Grafting of Acrylonitrile onto Ramie Fibers

Xiao Chaobo, Ren Shaozhi, Wu Lili   

  1. Department of Chemistry, Wuhan University, Wuhan 430072
  • Received:1997-04-07 Revised:1997-09-10 Published:1998-02-10 Online:1998-02-10

摘要: 棉、麻类织物通过与乙烯类单体接枝共聚可以提高染色性、皱折回复性、耐磨性、防污性 等[1]纤维素接枝共聚物的合成始于50年代,目前研究最多的是乙烯类单体通过自由基活性 中间体与纤维素进行接枝共聚,但此法存在一个突出的问题是在接枝共聚的同时生成大量均 聚物.铬酸(下文用Cr6+表示)是公认的强氧化剂,据报道[2~4],它单独存在时并不能引发乙烯 类单体聚合,如果用Cr6+引发乙烯类单体与纤维素接枝共聚,均聚物的生成量将会减少.本文以Cr6+为引发剂,将丙烯睛(AN)与竺麻纤维进行接枝共聚,考查不同条件对接枝率及均聚物 转化率的影响,找出最佳接枝条件.

关键词: 苎麻纤维, 丙烯腈, 接枝共聚合, 铬酸

Abstract: Graft copolymerization of acrylonitrile onto ramie fibers has been carried out withchromic acid as initiator.The effects of the concentrations of chromic acid, AN and H+ aswell as temperature an a time of polymerlzation on the graft ratio, yield of homopolymerhave been examined.The optimum conditions of grafting are: concentration of chromic acid 6 ?10-3 mol/L, of AN 2.0O mol/L, of H+ 0.8 mol/L, temperature 40 C and time 20 h.

Key words: ramie fiber, acrylonitrile, graft copolymerization, chromic acid