Orientation effects in monodomain nematic liquid crystalline polysiloxane elastomers
Orientation effects in monodomain nematic liquid crystalline polysiloxane elastomers
复制标题
单畴向列液晶聚硅氧烷弹性体的取向效应
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. Pople
中科院分区：
文献类型：
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作者：
D. Lacey;H. N. Beattie;G. Mitchell;J. Pople
合成了一系列基于聚硅氧烷的单区液晶(LC)弹性体。这些弹性体是在机械场存在的情况下用一种或两种交联剂制备的。通过使用雷丁大学(AXIS)的实时X射线设备，我们已经证明向列相有序参数<P2>既取决于扩展λ值，也取决于交联度。我们还表明，仅用一种交联剂就可以制备出具有永久排列和<P2>值约为0.5的单环弹性体，这使得这些单环LC弹性体的合成比Kupfer提出的方法简单得多，成本低得多。
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 Kupfer.