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Citation: YANG Jin-Zong, CAO Ya-Feng, LIU Zhao-Li, MA Xi-Chen. Effect of Nonionic Surfactant Emulsifiers in Inverse Emulsion on the Graft Copolymerization of AM-AC on Starch[J]. Chinese Journal of Applied Chemistry, ;2003, 20(8): 768-772. shu

Effect of Nonionic Surfactant Emulsifiers in Inverse Emulsion on the Graft Copolymerization of AM-AC on Starch

1.
a State Key of Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012;
2.
b Department of Chemical Engineering, Dalian Institute of Light Industry, Dalian 116034

Corresponding author: CAO Ya-Feng,
Received Date: 4 December 2002
Available Online: 10 May 2003

The graft copolymers were synthesized by copolymerization of starch with mixture of acrylamide(AM) and acrylic acid(AC). The graft copolymerization was carried out in the systems of Span20, Span60, Tween20, Tween81, OP4, OP10 and their mixtures, respectively. The effects of kind of emulsifiers, emulsification method and emulsifier concentration on the monomer conversion and grafting yield and specific viscosity have been discussed. At the following conditions of copolymerization:m(Span20):m(OP4)=40:60 or m(Span20):m(OP10)=60:40, mass fraction of mixture emulsifier in oil was 6%~7%, V(oil):V(water)=1.2:1, m(starch):m(monomer)=1:1, m(AM):m(AC)=4:1, c((NH₄)₂S₂O₈)=2.4×10^-4 mol/L,time 6 h, t=45℃, the grafting yield was 97%~98% and specific viscosity of the product was 1 010~1 020 mL/g.
- nonionic emulsifier,
- starch,
- acrylamide,
- acrylic acid,
- graft copolymerization,
- inverse emulsion
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