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Artículo

Phenylonium salts as third component of the photoinitiator system safranine O/triethanolamine: A comparative study in aqueous media

Gomez, María LorenaIcon ; Previtali, Carlos MarioIcon ; Montejano, Hernan AlfredoIcon
Fecha de publicación: 04/2007
Editorial: Elsevier
Revista: Polymer
ISSN: 0032-3861
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
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Resumen

The efficiency of the photoinitiator system composed of safranine and triethanolamine for the polymerization of acrylamide in water was improved by the incorporation of onium salts. The phenylonium salts employed were diphenyliodonium chloride, triphenylsulfonium triflate, tetraphenyphosphonium chloride and tetraphenylarsonium chloride hydrate. Among them, diphenyliodonium presents the highest efficiency, followed by triphenylsulfonium. In an appropriate concentration of triethanolamine, the behavior of the sulfonium salt resembles that of iodonium. Tetraphenyphosphonium and tetraphenylarsonuim have little effect over the polymerization rate; however, interesting effects over the photophysical properties of the system were found. Two important conclusions emanate from the work: the phenylonium salts studied aggregate in water in a behavior similar to hydrotropes and several factors contribute to the accelerating effect of the onium salt on the polymerization rate. The main differences in the observed efficiency of the salts might reside in the redox potentials of the salts and in their ability to prevent the photobleaching of safranine in the presence of triethanolamine. © 2007 Elsevier Ltd. All rights reserved.
Palabras clave: Onium Salts , Photopolymerization , Three-Component Photoinitiators
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/69962
URL: https://www.sciencedirect.com/science/article/pii/S0032386107001565
DOI: https://doi.org/10.1016/j.polymer.2007.02.015
Colecciones
Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Gomez, María Lorena; Previtali, Carlos Mario; Montejano, Hernan Alfredo; Phenylonium salts as third component of the photoinitiator system safranine O/triethanolamine: A comparative study in aqueous media; Elsevier; Polymer; 48; 8; 4-2007; 2355-2361
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