Orientation effects in monodomain nematic liquid crystalline polysiloxane elastomers
作者:D. Lacey、H. N. Beattie、G. R. Mitchell、J. A. Pople
DOI:10.1039/a705570f
日期:——
A series of monodomain liquid crystalline (LC) elastomers based on a polysiloxane were synthesised. These elastomers were prepared either with one or two cross-linking agents in the presence of a mechanical field. By using the real-time X-ray facility at the University of Reading (AXIS), we have shown that the nematic order parameter 〈P2 〉 is dependent on both the extension λ value and the degree of cross-linking. We have also shown that the monodomain elastomers, exhibiting permanent alignment and 〈P2 〉 values of about 0.5, can be prepared by using only one cross-linking agent making the synthesis of these monodomain LC elastomers much more simple and cost effective than that proposed by Küpfer.
我们合成了一系列基于聚硅氧烷的单域液晶(LC)弹性体。这些弹性体是在机械场的作用下使用一种或两种交联剂制备而成的。通过使用雷丁大学的实时 X 射线设施(AXIS),我们发现向列有序参数〈P2 〉既取决于延伸率 λ 值,也取决于交联程度。我们还证明,只需使用一种交联剂就能制备出表现出永久排列和〈P2 〉值约为 0.5 的单链低密度脂蛋白弹性体,这使得这些单链低密度脂蛋白弹性体的合成比 Küpfer 提出的方法更简单、更经济。