Reptation in langmuir polymer monolayers

被引:41
作者
Maestro, Armando [1 ,2 ]
Hilles, Hani M. [1 ]
Ortega, Francisco [1 ]
Rubio, Ramon G. [1 ]
Langevin, Dominique [2 ]
Monroy, Francisco [1 ,2 ]
机构
[1] Univ Complutense Madrid, Dept Quim Fis 1, E-28040 Madrid, Spain
[2] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France
关键词
MOLECULAR-WEIGHT DEPENDENCE; AIR-WATER-INTERFACE; SURFACE RHEOLOGY; DIMENSIONS; DYNAMICS; LAYERS; SCATTERING; FILMS;
D O I
10.1039/c0sm00250j
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 report the existence of reptation motion typical of entangled polymer chains in dense polymer monolayers spread at the air-water interface. Ellipsometry determinations of the layer thickness reveal a thickening of the layers in the semi-dilute region, enabling the existence of entanglements. Relaxation measurements were performed using compression and shear surface deformations. The resulting dependence on the chain concentration and size are compatible with the existence of diffusion reptation motions controlling molecular transport inside the monolayer. As in the bulk, these features are observed above a critical number of monomers, N-e, for which chain entanglements become possible.
引用
收藏
页码:4407 / 4412
页数:6
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