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Anomalous relaxation of self-assembled alkyl nanodomains in high-order poly(n-alkyl methacrylates)
- Source :
- Soft Matter, Soft Matter, Royal Society of Chemistry, 2008, 4, pp.1792-1795. ⟨10.1039/b807192f⟩, Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2008
- Publisher :
- HAL CCSD, 2008.
-
Abstract
- We have exploited the selectivity of neutron scattering combined with isotopic substitution to study the structure and dynamics of poly(n-alkyl methacrylates). Our diffraction data strongly support the suggested nanosegregation of main-chains and side groups. Moreover, we have been able to separately follow the dynamics of both subsystems at a molecular scale. While the structural relaxation observed at the main-chain level is standard, for high-order members the correlations involving side groups within the alkyl nanodomains relax through an exotic logarithmic decay. In these polymers, a strong dynamic asymmetry also develops. We discuss possible theoretical frameworks for the anomalous relaxation observed.<br />We thank the ILL scientists M. Maccarini, B. Deme and P. P. Deen for experimental help, and the NoE SoftComp, Contract NMP3-CT-2004-502235, ‘Donostia International Physics Center’, the projects MAT2007-63681, IT-436-07 (GV) and the Spanish Ministerio de Educacion y Ciencia (CSD2006-53) for financial support.
- Subjects :
- Diffraction
chemistry.chemical_classification
media_common.quotation_subject
02 engineering and technology
General Chemistry
Polymer
Neutron scattering
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Methacrylate
01 natural sciences
Asymmetry
3. Good health
0104 chemical sciences
chemistry
Chemical physics
Polymer chemistry
Relaxation (physics)
0210 nano-technology
Selectivity
[PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
Alkyl
media_common
Subjects
Details
- Language :
- English
- ISSN :
- 1744683X and 17446848
- Database :
- OpenAIRE
- Journal :
- Soft Matter, Soft Matter, Royal Society of Chemistry, 2008, 4, pp.1792-1795. ⟨10.1039/b807192f⟩, Digital.CSIC. Repositorio Institucional del CSIC, instname
- Accession number :
- edsair.doi.dedup.....8cca6d2dd56a3930ef762bbbc89b0209