Publisher: Chemical Society of Nigeria

Grafting of N,N-Dimethylacrylamide On Gum Arabic

D. E. Ogbeifun, F. E. Okieimen, J. M. Okuo
KEYWORDS: Gum Arabic, polyN,N-dimethyl acrylamide, grafting, copolymerisation.

ABSTRACT:

Graft  copolymerisation  of  N,N-dimethyl  acrylamide  onto  purified  gum  Arabic  obtained  from  Ketu  market,  Lagos  Nigeria  was  done  in a  homogeneous    system  using  ceric ion initiator    at  25oC .  The  highest  graft  level  was  obtained  at  4.0mM  ceric  ion  concentration.  The  characterisation  of the  grafted products  by  means  of  FTIR  and  Scanning  Electron Microscopy  furnished  the  evidence of  grafting  N,N-dimethyl  acrylamide  onto  gum  Arabic.  The  flocculation  behaviour  of  three  of  the grafted  copolymers  were  studied  in  0.25  wt%  Kaolin  suspension.  It  was  found  that  the  grafted copolymer with the highest molecular weight was the most efficient.


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