MODIFICATION OF GUM ARABIC
MODIFICATION OF GUM ARABIC
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Date
1990-06
Authors
Samue l, SOWUNMI ,
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Abstract
The physical and chemical modifications of gum arabic
have been attempted. The physical method involved the
p1asticization of gum arabic with sorbitol, glycerol and
ethylene glycol . The chemical method was by acid
hydrolysis, acetolysis and acetate formation. The films
Cast from the modified and untreated gumarabic so1utions
were subjected to stress-strain analyses and bond strength
tests.
It was found that the modulus of rigidity and ultimate
tensile stress for the chemically modified gum arabic
samp1es were generally higher than for the physical1y
modified samples.
However, the physically modified samples had the higherstrain
at break values. In all, the strain at break values
of modified samples were found to be higher than for the
untreated gum arabic sample, implying tougher films for
treated gum arabic samp1es than for untreated ones.
Of the physically modified samples, the sorbitol
plasticized gum arabic (with 3%. sorbitol) was found to have
the best adhesive properties, while for the chemically
modified samples, the 6%. acetolysed sample was found to
have the best adhesive properties.
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Keywords
MODIFICATION OF GUM ARABIC, MODIFICATION OF GUM ARABIC