Dynamic Homogeneity by Architectural Design - Bottlebrush Polymers
| Autor: | Krzysztof Matyjaszewski, Alper Nese, Tadeusz Pakula, George Floudas, Christos Grigoriadis, Hans-Jürgen Butt |
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| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Acrylate Materials science Polymers and Plastics Organic Chemistry Architectural design Polymer Condensed Matter Physics Methacrylate Dielectric spectroscopy chemistry.chemical_compound Rheology chemistry parasitic diseases Polymer chemistry Homogeneity (physics) Materials Chemistry Side chain Physical and Theoretical Chemistry |
| Zdroj: | Macromolecular Chemistry and Physics. 213:1311-1320 |
| ISSN: | 1022-1352 |
| DOI: | 10.1002/macp.201200064 |
| Popis: | The self-organization and dynamics of bottlebrush polymers consisting of poly(2-bromoisobutyryloxyethyl methacrylate) (PBiBEM) backbone and grafted n-butyl acrylate (PBA) chains are studied as a function of the side-chain length by X-ray scattering, dielectric spectroscopy, and rheology in relation to the respective homopolymers. All short-range correlations are dominated by the PBA side chains, whereas long-range correlations reflect the screening of the backbones by the side chains. Such correlations show up also in the segmental dynamics. The PBA segmental dynamics are slowed-down, whereas the backbone dynamics are plasticized by the side chains. Overall the bottle-brush architecture imparts dynamic homogeneity to the backbone and side-chain dynamics. |
| Databáze: | OpenAIRE |
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