Anomalous relaxation of self-assembled alkyl nanodomains in high-order poly(n-alkyl methacrylates)

被引：64

作者：

Arbe, A. ^{[1
]}

Genix, A. -C. ^{[2
]}

Colmenero, J. ^{[1
,3
]}

Richter, D. ^{[4
]}

Fouquet, P. ^{[5
]}

机构：

[1] CSIC UPV EHU, Ctr Fis Mat, San Sebastian 20080, Spain

[2] Univ Montpellier 2, CNRS, Lab Colloides Verres & Nanomat, UMR 5587, F-34095 Montpellier, France

[3] Donostia Int Phys Ctr, San Sebastian 20018, Spain

[4] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

[5] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

SOFT MATTER | 2008年 / 4卷 / 09期

关键词：

D O I：

10.1039/b807192f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：1792 / 1795

页数：4

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