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Título : Water-Soluble, Thermoresponsive, Hyperbranched Copolymers Based on PEG-Methacrylates: Synthesis, Characterization, and LCST Behavior
Autor : Luzon, Mario ; Boyer, Cyrille; Peinado, Carmen ; Corrales, Teresa ; Whittaker, Michael; Tao, Lei; Davis, Thomas P.
Palabras clave : crosslinked
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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