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Polymerization of acrylamide using the hydrogen peroxide–hydroxylamine couple
Author(s) -
Kay Theresa A.,
Rodriguez Ferdinand
Publication year - 1983
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1983.070280219
Subject(s) - polymerization , hydrogen peroxide , hydroxylamine , monomer , acrylamide , chemistry , polymer chemistry , decomposition , materials science , inorganic chemistry , nuclear chemistry , polymer , organic chemistry
The large heat of polymerization for acrylamide makes the measurement of conversion by temperature rise in an adiabatic system quite convenient. The initial monomer concentration in the reaction medium ranged from 0.2 to 0.8 mol/kg while the concentration of the two initiator components was varied from 1 to 100 mmol/kg. The adiabatic reactor was an aluminum beaker with a thin internal organic liner. The reactor was insulated and shielded. Approximate reactor charge was 200g. Iron has a pronounced accelerating effect on the rate. The predominant reaction appears to be the iron‐catalyzed decomposition of hydrogen peroxide in the presence of small amounts of hydroxylamine hydrochloride. At hydroxylamine to peroxide ratios greater than about 1:2, there seems to be no further benefit from hydroxylamine additions. The activation energy is lowered by the addition of iron decreasing from 18.7 kcal/mol with no added iron to 4.5 kcal/mol when the system contains 1 ppm iron.