Nanostructured thermotropic PBLG–PDMS–PBLG block copolymers
| Autor: | Emmanuel Ibarboure, Juan Rodríguez-Hernández, Eric Papon |
|---|---|
| Přispěvatelé: | Laboratoire de Chimie des polymères organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Université Sciences et Technologies - Bordeaux 1-Institut de Chimie du CNRS (INC), Team 1 LCPO : Polymerization Catalyses & Engineering, Laboratoire de Chimie des Polymères Organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2007 |
| Předmět: |
Nanostructure
Materials science polypeptides rodlike Polymers and Plastics 02 engineering and technology 010402 general chemistry 01 natural sciences Thermotropic crystal chemistry.chemical_compound Liquid crystal isotropization Polymer chemistry Materials Chemistry Copolymer triblock copolymers poly(gamma-benzyl-L-glutamate) N-carboxyanhydrides Polydimethylsiloxane Small-angle X-ray scattering Transition temperature Organic Chemistry technology industry and agriculture self-assembly 021001 nanoscience & nanotechnology 0104 chemical sciences liquid-crystalline properties [CHIM.POLY]Chemical Sciences/Polymers chemistry Chemical engineering Self-assembly 0210 nano-technology |
| Zdroj: | Polymer Polymer, Elsevier, 2007, 48 (13), pp.3717-3725. ⟨10.1016/j.polymer.2007.04.046⟩ |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2007.04.046 |
| Popis: | International audience; We report on the nano-organization and the thermal behavior of a series of triblock copolymers composed of a central soft polydimethylsiloxane (PDMS) and two polypeptide (poly-gamma-benzyl-L-glutamate) blocks. Peptide blocks with varied lengths and therefore different secondary structures (beta-sheet or alpha-helical) were attached to the PDMS central block. These two blocks are incompatible and microphase separate into different morphologies elucidated by polarized optical microscopy (POM), small-angle light scattering (SALS), X-ray spectroscopy (SAXS, WAXS) and atomic force microscopy (AFM). We demonstrate that the relative ratio of PBLG to PDMS direct both the type of nanodomain morphologies formed and also modifies the transition temperature. Each of these block copolymers have shown a reversible transition associated to its thermotropic liquid crystal behavior. At temperatures above the transition, the self-assembled structures are disrupted and prevented the organization at larger scales. (C) 2007 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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