Unimolecular nanoparticles via carbon-carbon 'Click' chemistry for all-polymer nanocomposites
| Autor: | José A. Pomposo, Pegah Khanjani, Lorea Buruaga, Irma Perez-Baena |
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| Přispěvatelé: | Diputación Foral de Guipúzcoa, Eusko Jaurlaritza, Consejo Superior de Investigaciones Científicas (España), Ikerbasque Basque Foundation for Science |
| Rok vydání: | 2012 |
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| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Trabajo presentado al European Symposium on Polymer Blends celebrado en San Sebastian (España) del 25 al 28 de Marzo de 2012. We report for the first time the synthesis of unimolecular polystyrene-based nanoparticles (PS-NPs) under normal air atmosphere by direct carbon-carbon “click” chemistry (i.e., “self-click” chemistry). First, statistical poly(styrene-co-4-vinylbenzyl chloride) copolymers synthesized by RAFT polymerization were decorated in a facile manner with alkyne groups by reaction with potassium propiolate, providing well-defined nanoparticle precursors (PS-Prec). Next, individual PS-Prec chains were collapsed irreversibly to unimolecular nanoparticles of ca. 12 nm in size by intrachain Cu(II)-catalyzed alkyne dimerization under high-dilution conditions, as revealed by SEC, H1-NMR, DLS and TEM measurements. Based on predictions from a recent compressible thermodynamic model, the resulting nanoparticles could be promising materials for the development of homogeneous, miscible PS-NPs / polycarbonate all-polymer nanocomposites This work was supported by Gipuzkoako Foru Aldundia (project 2011-CIEN-000085-01) and Basque Government (Project S-PE11UN009). I. P.-B. thanks CSIC for her JAE-PREDOC grant. L. B. acknowledges financial support by Basque Excellence Research Center-Materials Physics Center (BERC-MPC). |
| Databáze: | OpenAIRE |
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