pieces to improve dissolution and 0 42 g licl were added to a flask containing 20 ml of dimethylacetamide dmac the mixture was heated at 120 u00b0 c for 2 hours to complete dissolution the solution was filtered to remove a small amount of residual undissolved material then 0 1 g cellulose acetate eastman chemical company degree of substitution 1 7 was added to the solution followed by heating at 50 u00b0 c for 1 5 hours the above solution was transferred to a syringe and injected into 200 ml of distilled water with vigorous agitation by a household blender a uniform suspension water aramid cellulose acetate and dmac with some foam on the top was observed after collapsing the foam 20 ml of commercial household hypochlorite bleach was added to 180 ml of the above suspension so that the concentration of sodium hypochlorite was 0 6 wt active chlorine the chlorination was performed at room temperature for 1 hour at ph 7 which was adjusted by adding 6 m hydrochloric acid while mild stirring was applied in order to separate aramid cellulose acetate from the chlorination bath the chlorinated aramid cellulose acetate suspension was centrifuged and the clear solvent was decanted the precipitated porous particles were resuspended and washed in distilled water followed by centrifgugation three times then they were freeze dried and heated in air at 45 u00b0 c overnight to remove any residual free chlorine the collected particles of blended nomex polymer cellulose acetate were analyzed for retained chlorine using.