Graft Copolymers as Dispersants for CWM

Abstract

We have been studying on the graft copolymers as an additive for preparing coal water mixture (CWM). Various graft copolymers were synthesized by the radical copolymerization using macromonomers, for example, hydrophobic polymer with hydrophilic polymer side chain or hydrophilic polymer with hydrophobic polymer side chain. The effect as an additive was evaluated by measurements of the amount of adsorption, the viscosity and the stability of CWM. The graft copolymers of sodium-polyacrylic acid with polystyrene side chain showed higher adsorption on coal and lower viscosity of CWM. The results indicated that graft copolymers could be used as an effective additive for preparing CWM.

Keywords:

• Graft polymer
• hydrophobic
• dispersant

Additional information

Notes on contributors

HARUYUKI YOSHIHARA

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