Chain confinement effects on interdiffusion in polymer multilayers

被引：13
|
作者：
Sivaniah, E
Sferrazza, M
Jones, RAL
Bucknall, DG
机构：
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] Rutherford Appleton Lab, ISIS, Didcot OX11 0QX, Oxon, England
来源：
PHYSICAL REVIEW E | 1999年 / 59卷 / 01期
关键词：
D O I：
10.1103/PhysRevE.59.885
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We have measured interdiffusion in polystyrene on length scales approaching and below the overall dimensions of the polymer molecules, by using neutron reflectometry to follow the relaxation of the composition modulation in an isotopic polymer multilayer. After an initial transient, relaxation of the composition modulation is diffusive, even for times less than the reptation time. The diffusion coefficient decreases with increasing wave vector, in qualitative, but not quantitative, accord with theory. [S1063-651X(99)11801-4].
引用
收藏
页码：885 / 888
页数：4
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