A study on sorbitol-ceric ion initiated polymerization of acrylonitrile
β Scribed by N. Mohanty; B. Pradhan; M.C. Mahanta
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 318 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0014-3057
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β¦ Synopsis
The polymerization of acrylonitrile (M) initiated by the sorbitol (R)-C.e(IV) redox system has been studied in sulphuric acid in the range 30--40 Β° under nitrogen. At moderately high concentrations of Co(IV) (0.00015-0.02 M), the rate of polymerization (Rp) is proportional to [M'I s/2 and ['R'I j/2 and the rate of C__.e{IV) disappearance is proportional to l'R] and [Ce{IV)I. At lower concentration of C_~IV) (0.00005-0.00015 M), Rp is proportional to [M], JR] 1/2 and [Ce(IV)] I:: and rate of C_.Β’(IV) disappearance is proportional to JR] and rCc{IV)]. The effects of certain salts, acid, solvent and temperature on both rates have been investigated. A kinetic scheme involving mutual termination has been proposed and various rate and energy parameters evaluated. At still higher concentration of Co(IV) (> 0.02 M), a linear mode of termination seems to operate.
π SIMILAR VOLUMES
The micellar effect on the kinetics of ceric ion-initiated polymerization of acrylonitrile (AN) in the presence of N-acetylglycine has been studied in the temperature range 30- 50Β°C. The neutral emulsifier (Triton X-100) has no effect on the Rp, whereas both anionic (NaLS) and cationic (NCTAB) emuls