Aqueous Polymerization of Acrylamide Initiated by Ce(lV)-Thioglycolic Acid Redox System
The aqueous polymerization of acrylamide initiated by the redox system Ce(1V)-thioglycolic acid has been studied at 35 ± 0.2°C. The pH measurement shows that a 1:1 metal:ligand complex is formed between Ce(IV) and thioglycolic acid (TGA). The rate of polymerization is given by R P =K[M]1.08[Ce 4+ ]...
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| Veröffentlicht in: | Journal of macromolecular science. Chemistry 1981-08, Vol.16 (3), p.601-613 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The aqueous polymerization of acrylamide initiated by the redox system Ce(1V)-thioglycolic acid has been studied at 35 ± 0.2°C. The pH measurement shows that a 1:1 metal:ligand complex is formed between Ce(IV) and thioglycolic acid (TGA). The rate of polymerization is given by R
P
=K[M]1.08[Ce
4+
]
0.65
[TGA]°
The overall energy of activation has been found to be 4.56 kcal/ deg/mol (19.06 kJ/mol). The number-average molecular weight (
M
n
) of the polymer is directly proportional to the rate of polymerization. The
M
n
of the polymer decreases with increasing concentration of both Ce
4+
and DMF. |
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| ISSN: | 0022-233X 2332-4082 |
| DOI: | 10.1080/00222338108056808 |