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Citation: FANG Fang, XIAO Cong-Ming, LAN Xin-Ren. Graft Copolymerization of Maleic acid onto Starch Initiated by Fenton's Reagent to Prepare Carboxylic Derivatives of Starch[J]. Chinese Journal of Applied Chemistry, ;2007, 24(12): 1392-1395. shu

Graft Copolymerization of Maleic acid onto Starch Initiated by Fenton's Reagent to Prepare Carboxylic Derivatives of Starch

1.
College of Materials, Science and Engineering, Huaqiao University, Quanzhou 362021

Corresponding author: XIAO Cong-Ming,
Received Date: 8 December 2006
Available Online: 10 February 2007
Fund Project: 福建省自然科学基金计划资助项目(E0640005) (E0640005)

To prepare starch-based polyanion or to incorporate carboxyl groups onto the backbone of starch,radical copolymerization of starch and maleic acid in an aqueous medium was performed with Fenton's reagent as the redox initiator.The effect of reaction conditions such as the initiator concentration,reaction temperature and reaction time on the percent content of carboxyl groups(PCCG) of the derivative was investigated.It was found that the PCCG of the derivative could be 31.32% when 3 g starch and 3 g maleic acid were initiated by both 0.009 85 mol/L Fe²⁺ and 4.412 mol/L H₂O₂ and copolymerized at 60℃ for 5 h.In addition,PCCG of the derivative could be controlled between 2.7%~31.5% by adjusting the initiator concentration or the reaction temperature.The structure of the derivative was verified by FTIR.X-ray diffraction and TGA results showed that both the crystallinity and 20%-decomposed temperature of the carboxylic derivative decreased with the increase of PCCG.
- Fenton's reagent,
- copolymerization,
- starch,
- maleic acid,
- carboxylic derivative
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