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Titolo:
AQUEOUS POLYMERIZATION OF METHYL-METHACRYLATE AND CHARACTERIZATION OFTHE OBTAINED POLYMERS IN THE PRESENCE OF N,N-DIOXALYL P-AMINO BENZOYLN,N-DIOXALYL UREA AND ITS FE(II) AND FE(III) COMPLEXES
Autore:
SABBAH IA; ELKHALEK AA; SAYYAH SM; MOHAMED SA; EWAIS HA;
Indirizzi:
CAIRO UNIV,FAC SCI,DEPT CHEM,BENI SUEF BRANCH BANI SUWAYF EGYPT CAIRO UNIV,FAC SCI,DEPT CHEM,BENI SUEF BRANCH BANI SUWAYF EGYPT AL-AZHAR UNIV,FAC SCI,DEPT CHEM NASR EGYPT
Titolo Testata:
Journal of applied polymer science
fascicolo: 1, volume: 54, anno: 1994,
pagine: 1 - 11
SICI:
0021-8995(1994)54:1<1:APOMAC>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
THIN-LAYER CHROMATOGRAPHY; EMULSION POLYMERIZATION; POLY(METHYL; FRACTIONATION; METAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
I.A. Sabbah et al., "AQUEOUS POLYMERIZATION OF METHYL-METHACRYLATE AND CHARACTERIZATION OFTHE OBTAINED POLYMERS IN THE PRESENCE OF N,N-DIOXALYL P-AMINO BENZOYLN,N-DIOXALYL UREA AND ITS FE(II) AND FE(III) COMPLEXES", Journal of applied polymer science, 54(1), 1994, pp. 1-11

Abstract

The emulsifier-free emulsion polymerization of methyl methacrylate (MMA) was studied using sodium bisulfite as initiator in the absence andpresence of a new organic chelating agent, N,N-dioxalyl p-amino benzoyl N,N-dioxalyl urea, and its iron (II) and (III) complexes. The organic ligand with free carboxyl groups has a retarding effect on the polymerization reaction while its iron complexes have a catalytic effect. The mechanisms of the catalytic effect of iron complexes or the inhibition mechanism of the organic ligand are discussed. The effect of pH values on the polymerization processes was also investigated. The apparent energy of activation was found to be 4.99 x 10(4) J/mol, 6.38 x 10(4) J/mol, 4.46 x 10(4) J/mol, and 3.72 x 10(4) J/mol in the absence and in the presence of 0.5 g of ligand and 0.1 g of its Fe (II) and (III) complexes, respectively. (C) 1994 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 06:10:17