Shear flow induced transition from liquid-crystalline to polymer behavior in side-chain liquid crystal polymers

被引：41

作者：

Noirez, L

Lapp, A

机构：

[1] Laboratoire Léon Brillouin (CEA-CNRS), Ce-Saclay, Gif-sur-Yvette

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.78.70

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We determine the structure and conformation of side-chain liquid-crystalline polymers subjected to shear flow in the vicinity of the smectic phase by neutron scattering on the velocity gradient plane. Below the nematic-smectic transition we observe a typical liquid-crystal behavior; the smectic layers slide, leading to a main-chain elongation parallel to the velocity direction. In contrast, a shear applied above the transition induces a tilted main-chain conformation which is typical for polymer behavior.

引用

页码：70 / 73

页数：4

共 10 条

[1]

BRUINSMA RF, 1990, MATER RES SOC SYMP P, V177, P153

[2] X-RAY-DIFFRACTION BY MESOMORPHIC COMB-LIKE POLYMERS [J].