中华医学超声杂志

应用化学 ›› 1989, Vol. 0 ›› Issue (1): 36-40.

• 研究论文 • 上一篇    下一篇

腐植酸与苯乙烯的接枝共聚改性

余小春, 侯贵, 张德和   

  1. 中国科学院化学研究所 北京
  • 收稿日期:1987-12-21 修回日期:1988-04-05 出版日期:1989-02-10 发布日期:1989-02-10

MODIFICATION OF HUMIC ACID BY GRAFT COPOLYMERIZATION WITH STYRENE

Yu Xiaochun, Hou Gui, Zhang Dehe   

  1. Institute of Chemistry, Academia Sinica, Beijing
  • Received:1987-12-21 Revised:1988-04-05 Published:1989-02-10 Online:1989-02-10

PDF

432

被引次数

14 | 3

摘要： 研究了腐植酸(HA)与苯乙烯(St)以H2O2-FeCl2为引发体系的接枝共聚。结果表明,HA对St聚合有阻聚及滞聚作用。接枝度在H2O2/FeCl2=3(摩尔比)时有极大值,提高聚合温度可使接枝效率和接枝度同时增加、增加St-HA的用量比可使接枝度增加,但接枝效率降低,接枝比基本不变。由接枝共聚物的红外光谱分析得出HA与PSt是以C-O-C连接的。接枝共聚物的磺化产物在水和酸性介质中均能溶解。

关键词: 腐植酸, 苯乙烯, 接技共聚, 磺化

Abstract: Graft copolymerization of styrene. (St) onto humic acid (HA), using H2O2- FeCl2redox system as initiator in DMOSmedium was investigated.It was found that HA had dis-tinct inhibiting and retarding effect on the polymerization of St,and the ratio of H2O2-FeCl2 was an important factor influencing the graft copolymerization.With increase of the H2O2-FeCl2 ratio,the rate of polymerization increased,while the grafting cfficiency decrea-sed, the grafting degree approched a maximal value when the H2O2-FeCl2 ratio was 3(mol/mol).The grafting efficiency and grafting degree increased with increase of polym-erization temperature The ratio of St to HA also had a direct influence on the graftingefficiency and grafting degree but not on the grafting ratio. The appearance of a newadsorption band (1120 cm-l) in the IR spectrum of copolymer was attributed to C-O-C link formed in the HA-g-PSt molecule during the polymerization. The product obtainedby further sulfonation of graft copolymer is readily Soluble in water, acid and alkali solution.

Key words: Humic Acid, Styrene, Graft copolymerization, Sulfonation

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