Component segmental mobilities in an athermal polymer blend: Quasielastic incoherent neutron scattering versus simulation

被引：48

作者：

Doxastakis, M ^{[1
]}

Kitsiou, M

Fytas, G

Theodorou, DN

Hadjichristidis, N

Meier, G

Frick, B

机构：

[1] Univ Patras, Dept Chem Engn, Patras 26500, Greece

[2] Inst Chem Engn & High Temp Chem Proc, Patras 26500, Greece

[3] Univ Athens, Dept Chem, Athens 15771, Greece

[4] FORTH, Inst Elect Struct & Laser, Heraklion, Crete, Greece

[5] Max Planck Inst Polymerforsch, D-55021 Mainz, Germany

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

来源：

JOURNAL OF CHEMICAL PHYSICS | 2000年 / 112卷 / 19期

关键词：

D O I：

10.1063/1.481471

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：

The local dynamics of the miscible blend of cis-1,4 polyisoprene (PI) (70% by weight) with 1,2 polybutadiene (PVE) (30% by weight) is studied. Quasielastic incoherent neutron scattering (QENS) experiments have provided the dynamic structure factor for each component in the blend far above the glass transition temperature. Molecular dynamics simulations on the same system have given segmental relaxation functions in good agreement with the experiments. Both methods reveal differences in the mobilities of each component, even at high temperatures, emphasizing intramolecular factors. Remarkably, the segmental relaxation of the PVE component in the PI/PVE blend rich in PI resembles that of PI and not of the pure PVE. (C) 2000 American Institute of Physics. [S0021-9606(00)51719-X].

引用

页码：8687 / 8694

页数：8