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Titolo:
Effect of sparteine on the photopolymerization of methyl and ethyl methacrylates with bis(cyclopentadienyl)titanium dichloride in a water-methanol mixture
Autore:
Sato, T; Shibata, H; Seno, M;
Indirizzi:
Univ Tokushima, Fac Engn, Dept Chem Sci & Technol, Tokushima 7708506, Japan Univ Tokushima Tokushima Japan 7708506 Technol, Tokushima 7708506, Japan
Titolo Testata:
JOURNAL OF APPLIED POLYMER SCIENCE
fascicolo: 5, volume: 80, anno: 2001,
pagine: 815 - 822
SICI:
0021-8995(20010502)80:5<815:EOSOTP>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLY(METHYL;
Keywords:
photopolymerization; Cp2TiCl2; methacrylate; sparteine;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Sato, T Univ Tokushima, Fac Engn, Dept Chem Sci & Technol, Minamijosanjima2-1, Tokushima 7708506, Japan Univ Tokushima Minamijosanjima 2-1 Tokushima Japan 7708506 Japan
Citazione:
T. Sato et al., "Effect of sparteine on the photopolymerization of methyl and ethyl methacrylates with bis(cyclopentadienyl)titanium dichloride in a water-methanol mixture", J APPL POLY, 80(5), 2001, pp. 815-822

Abstract

The photopolymerization of methyl methacrylate (MMA) with bis(cyclopentadienyl)titanium dichloride (Cp2TiCl2) in a H2O-MeOH [1 : 1 (v/v)] mixture wasexamined at 40 degreesC in the presence of 2,2'-bipyridyl (Bipy), 1,10-phenanthlorine (Phen) or sparteine (Spr) as the chelating reagent. The presence of these chelating reagents retarded the photopolymerization. Poly(MMA)s formed in the presence of them were found to contain a considerable fraction of the benzene-insoluble part, in contrast to the ones in the absence of them. Spr was the most effective for formation of the insoluble part. The benzene-insoluble poly(MMA) was insoluble in usual organic solvents including acetone, tetrahydrofuran, ethyl acetate, and dimethyl sulfoxide, suggesting crosslinking. However, poly(MMA) reproduced by hydrolysis of the insoluble part followed by methylation was soluble in usual organic solvents, indicating no crosslinking between polymer main chains. The insoluble part was thermally more stable than the soluble part. Polymerization of ethyl methacrylate in the presence of Spr gave similar results. (C) 2001 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 01:44:47