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Artículo

Lithium naphthalenides in non-polar or in low polarity media: Some insights regarding their use as initiators in anionic polymerizations

Ninago, Mario DanielIcon ; Sena Marani, María LoretaIcon ; Gonzalez, Verónica AlejandraIcon ; Satti, Angel JoseIcon ; Sarmoria, ClaudiaIcon ; Villar, Marcelo ArmandoIcon ; Valles, Enrique MarceloIcon ; Ciolino, Andrés EduardoIcon
Fecha de publicación: 14/06/2016
Editorial: Springer Verlag Berlín
Revista: Polymer Bulletin
ISSN: 0170-0839
e-ISSN: 1436-2449
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Nano-materiales

Resumen

The synthesis of bidirectional anionic initiators by the reaction between metallic lithium (Li) and naphthalene (Naph), under mild conditions, in non-polar(benzene) or low-polarity media (benzene/THF mixtures) is reported. The efficiency of these initiators to provide macromolecules with well-defined structures was demonstrated. Model linear homopolymers from styrene (S) or hexamethyl(ciclotrisiloxane)(D3) monomers were synthesized using classical anionic polymerization (high-vacuum techniques). The model polymers obtained were analyzed using the conventional analytical techniques, and showed narrow molar mass distributions, a broad range of molar masses (from 3000 to 1,000,000 g/mol) and polydispersity indexes (Mw/Mn) lower than 1.1. High molar mass polymers were obtained using pure benzene as solvent, where as lower molar masses were obtained in benzene/THF mixtures in which the concentration of THF was lower than 10 %v/v. The ratio [Li]/[Naph] and the nature of the reaction medium are the experimental parameters to be controlled to obtain the desired lithium naphthalenides.
Palabras clave: Lithium Naphtaleinides Iniciator , Anionic Polymerization , Polystyrene
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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/11336/26968
DOI: http://dx.doi.org/10.1007/s00289-016-1715-2
URL: https://link.springer.com/article/10.1007/s00289-016-1715-2
Colecciones
Articulos(INQUISUR)
Articulos de INST.DE QUIMICA DEL SUR
Articulos(PLAPIQUI)
Articulos de PLANTA PILOTO DE INGENIERIA QUIMICA (I)
Citación
Ninago, Mario Daniel; Sena Marani, María Loreta; Gonzalez, Verónica Alejandra; Satti, Angel Jose; Sarmoria, Claudia; et al.; Lithium naphthalenides in non-polar or in low polarity media: Some insights regarding their use as initiators in anionic polymerizations; Springer Verlag Berlín; Polymer Bulletin; 74; 2; 14-6-2016; 307-323
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