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Titolo:
Using linear and branched polysilanes for the photoinitiated polymerization of a commercial silicone-acrylate resin. A real time FTIR study
Autore:
Peinado, C; Alonso, A; Catalina, F; Schnabel, W;
Indirizzi:
CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, Spain CSIC MadridSpain E-28006 ncia & Tecnol Polimeros, E-28006 Madrid, Spain Hahn Meitner Inst Kernforsch Berlin GmbH, D-14109 Berlin, Germany Hahn Meitner Inst Kernforsch Berlin GmbH Berlin Germany D-14109 Germany
Titolo Testata:
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
fascicolo: 1, volume: 141, anno: 2001,
pagine: 85 - 91
SICI:
1010-6030(20010615)141:1<85:ULABPF>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOPOLYMERIZATIONS; MONOMERS; POLYMERS;
Keywords:
polysilanes; macromolecular photoinitiators; FTIR; silicone-acrylate resins;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Peinado, C CSIC, Inst Ciencia & Tecnol Polimeros, C Juan de la Cierva 3, E-28006 Madrid, Spain CSIC C Juan de la Cierva 3 Madrid Spain E-28006 Madrid, Spain
Citazione:
C. Peinado et al., "Using linear and branched polysilanes for the photoinitiated polymerization of a commercial silicone-acrylate resin. A real time FTIR study", J PHOTOCH A, 141(1), 2001, pp. 85-91

Abstract

The photo-crosslinking of a silicone-based oligomer, bearing pendant acrylate groups, has been carried out using linear polysilanes (poly(methyl phenyl silane), poly(methyl-n-propyl silane), poly(di-n-hexyl silane)) and a branched one, poly(p-butylphenyl phenyl silane-co-phenyl silyne), as initiators. The curing rate was measured with the aid of the real time Fourier transformed infrared spectroscopy. Apart from the neat oligomer also formulations containing reactive diluents, i.e. acrylic and vinyl ether monomers werephoto-cured. An excellent curing performance (final conversion of about 95%) was achieved with a 1:1 (w:w) blend of the oligomer with 2-ethyl hexyl methacrylate (EHMA). n-Butyl vinyl ether (BVE) was found to copolymerize with the pendant acrylate groups. Moreover, in the presence of diphenyl iodonium chloride it homopolymerized simultaneously by a cationic mechanism. In this way interpenetrating structures were formed. The iodonium ions oxidize some of the photo-generated silyl radicals thus producing initiating cations. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 09:41:25