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Título: | Water-Soluble, Thermoresponsive, Hyperbranched Copolymers Based on PEG-Methacrylates: Synthesis, Characterization, and LCST Behavior |
Autor: | Luzon, Mario CSIC; Boyer, Cyrille; Peinado, Carmen CSIC; Corrales, Teresa CSIC ORCID; Whittaker, Michael; Tao, Lei; Davis, Thomas P. | Palabras clave: | Crosslinking Crosslinking hyperbranched PEGMA reversible addition fragmentation chain transfer (RAFT) thermoresponsive |
Fecha de publicación: | 2010 | Editor: | John Wiley & Sons | Citación: | Journal of Polymer Science Part A: Polymer Chemistry 48 (13) : 2783 - 2792 (2010) | Resumen: | A series of water-soluble thermoresponsive hyperbranched copoly(oligoethylene glycol)s were synthesized by copolymerization of di(ethylene glycol) methacrylate (DEGMA) and oligo(ethylene glycol) methacrylate (OEG-MA, Mw ¼ 475 g/mol), with ethylene glycol dimethacrylate (EGD-MA) used as the crosslinker, via reversible addition fragmentation chain transfer polymerization. Polymers were characterized by size exclusion chromatography and nuclear magnetic resonance analyses. According to the monomer composition, that is, the ratio of OEG-MA: DEG-MA: EGD-MA, the lower critical solution temperature (LCST) could be tuned from 25 C to 90 C. The thermoresponsive properties of these hyperbranched copolymers were studied carefully and compared with their linear analogs. It was found that molecular architecture influences thermoresponsive behavior, with a decrease of around 5–10 C in the LCST of the hyperbranched polymers compared with the LCST of linear chains. | Versión del editor: | http://dx.doi.org/10.1002/pola.24027 | URI: | http://hdl.handle.net/10261/57887 | DOI: | 10.1002/pola.24027 | ISSN: | 0887-624X |
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