Texture evolution during the polydomain-monodomain transition in nematic elastomers
Texture evolution during the polydomain-monodomain transition in nematic elastomers
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DOI：
10.1021/ma980195j
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发表时间：
1998-07-28
期刊：
影响因子：
5.5
通讯作者：
Finkelmann, H
中科院分区：
文献类型：
--
作者：
Clarke, SM;Terentjev, EM;Finkelmann, H
研究了液晶弹性体的多畴-单畴转变行为。在不断增加的拉伸载荷下出现的纹理已被检查与光学显微镜，X射线，和小角度偏振光散射的组合。实验数据被解释在本地董事的重定向与增加扩展。在低延伸率的技术的这种组合的结果是一致的二维周期性的董事纹理。这种调制的幅度不断下降的介晶被拉到拉伸方向在高负荷。以这种方式，在无负载下为多结构域的样品随着延伸的增加而基本上变成单结构域。
We have studied the behavior of a liquid crystalline elastomer undergoing a polydomain-monodomain transition. The textures emerging under increasing extensional load have been examined with a combination of optical microscopy, X-ray, and small-angle polarized light scattering. The experimental data are interpreted in terms of reorientation of the local director with increasing extension. The results of this combination of techniques at low extensions are consistent with a two-dimensionally periodic director texture. The amplitude of this modulation decreases continuously as the mesogens are pulled into the extensional direction at high loads. In this manner the samples which are polydomain under no load become essentially monodomain with increasing extension.