Ak. Bajpai et Op. Sharma, KINETICS OF RETARDATION IN PERSULFATE-FE3-BISULFITE INITIATED POLYMERIZATION OF ACRYLAMIDE(), Indian journal of chemistry. Sect. A: Inorganic, physical, theoretical & analytical, 35(12), 1996, pp. 1091-1096
The kinetics of persulphate-Fe3+-bisulphite initiated polymerization h
as been studied at 30 +/- 0.2 degrees C in oxygen atmosphere. It has b
een found that the polymerization kinetics is significantly altered by
Fe3+ concentration. At lower concentration (2.0 x 10(-4) mol dm(-3))
of Fe3+ the rate of polymerization follows the rate equation R(p) prop
ortional to [monomer] [S2O82-] while at higher concentration (8.0 x 10
(-4) mol dm(-3)) the rate equation becomes R(p) proportional to[M][HSO
3-]. Besides affecting the polymerization kinetics Fe3+ also decreases
the molecular weight of the resulting polymers. The effects of added
salts and temperature on the polymerization process have also been inv
estigated and energy of activation is calcualted to be 42.6 kJ mol(-1)
. Retarding effect of various aliphatic alcohols, nitro compounds and
nitrophenols has been studied in terms of retardation constants.