Anomalous relaxation of self-assembled alkyl nanodomains in high-order poly(n-alkyl methacrylates) Auteur(s): Arbe A., Genix A.-C., Colmenero J., Richter D., Fouquet P. (Article) Publié: Soft Matter, vol. 4 p.1792-1795 (2008) Texte intégral en Openaccess : Ref HAL: hal-00498017_v1 DOI: 10.1039/b807192f WoS: 000260376900008 Exporter : BibTex | endNote 60 Citations Résumé: 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. |