Vol.4, No.1 (2011), 1-7
% graft level
180
160
140
120
100
DS: 0.215 DS: 0.120 80 DS: 0
60
40
20
0 0
10
20
30
40
50
60
amount of AA (mmol)
Fig.-2: Effect of monomer concentration on graft level of AA on unmodified and modified holocellulose using 6 mmol of Ce4+ at 29째C for 1 hour % graft level
200
180
160
140
120
100
DS: 0.215 DS: 0.120 DS: 0
80
60
40
20
0 0
20
40
60
80
100
120
Initiation time (minites)
Fig.-3: Effect of initiation time on graft level of AA on unmodified and modified holocellulose using 4.36 mmol of Ce4+, 30 mmol of monomer at 29째C for 1 hour
CONCLUSION The results from this study are consistent with the view that graft copolymerisation onto cellulose is sensitive to the degree of swelling i.e. accessibility of the substrate.
GRAFT COPOLYMERISATION OF ACRYLAMIDE
6
Abel Tame et al.