Lithium naphthalenides in non-polar or in low polarity media: Some insights regarding their use as initiators in anionic polymerizations
- Ninago, Mario Daniel
- Sena Marani, María Loreta
- Gonzalez, Verónica Alejandra
- Satti, Angel Jose
- Sarmoria, Claudia
- Villar, Marcelo Armando
- Valles, Enrique Marcelo
- Ciolino, Andrés Eduardo
DOIAbstract
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 ...
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