SHEAR ORIENTATION OF A LAMELLAR LYOTROPIC LIQUID-CRYSTAL

被引：27
|
作者：
LAUGER, J
LINEMANN, R
RICHTERING, W
机构：
[1] UNIV FREIBURG,INST MAKROMOLEK CHEM,D-79104 FREIBURG,GERMANY
[2] UNIV FREIBURG,FREIBURGER MAT FORSCHUNGSZENTRUM,D-79104 FREIBURG,GERMANY
来源：
RHEOLOGICA ACTA | 1995年 / 34卷 / 02期
关键词：
LYOTROPIC LAMELLAR PHASE; SHEAR ORIENTATION; RHEO-SMALL-ANGLE LIGHT SCATTERING; NONIONIC SURFACTANT; LIQUID CRYSTAL;
D O I：
10.1007/BF00398432
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Shear orientation of a lyotropic lamellar liquid crystalline phase of tetra ethyleneglycol mono dodecylether, C(12)E(4), in water was studied by combined rheo-small-angle light scattering. Shear thinning was observed with a sample of 500 mu m thickness. The scattering patterns showed that domains were aligned and stretched in flow direction. Shear thinning was also observed with a thinner sample, but caused a strong change in light-scattering pattern. A maximum of scattering intensity was observed at finite scattering vector and shifted to a higher scattering vector with increasing shear stress. This observation can be explained by a fragmentation of domains at high shear stress and is supported by a mosaic texture observed in optical microscopy.
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页码：132 / 136
页数：5
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