KINETICS OF RETARDATION IN PERSULFATE-FE3-BISULFITE INITIATED POLYMERIZATION OF ACRYLAMIDE()

Citation
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
Citations number
22
Categorie Soggetti
Chemistry
ISSN journal
03764710
Volume
35
Issue
12
Year of publication
1996
Pages
1091 - 1096
Database
ISI
SICI code
0376-4710(1996)35:12<1091:KORIPI>2.0.ZU;2-I
Abstract
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.