Graftcopolymer
Pg
% Chemical resistance% wt. loss after 72hour % Moisture absorbanceat different RH after 12 hours
Hs-g-poly-   1N HCl 1N NaOH 30-35% 50-55% 60-65% 85-90%
H. sabdariffa - 55.0 43.0 0.5 0.8 1.8 2.5
(EA) 117.30 04.0 - - - - 0.2
(EA-co-AN) 175.10 - - - - - -
(EA-co-MA) 179.96 - - - - - -
Phenoplast - 04.0 02.0 - - 3.0 5.0
Hs-r-PF-C - 01.0 - - - - 3.0
Where C= composite.
Table 4: Chemical resistance and moisture absorbance studies of composite, graft copolymers vis-a-vis back bone.
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