A Liquid-Crystalline Co-Polysiloxane with Asymmetric Bent Side Chains

作者：Bubnov Alexej^*; Novotna Vladimira; Pociecha Damian; Kaspar Miroslav; Hamplova Vera; Galli Giancarlo; Glogarova Milada

来源：Macromolecular Chemistry and Physics, 2011, 212(2): 191-197.

DOI：10.1002/macp.201000356

• calorimetry
• liquid-crystalline polymers (LCP)
• monomers
• phase behavior
• polysiloxanes

A co-polysiloxane has been prepared with an asymmetric bent side group based on a liquid-crystalline monomer showing a B(2) (SmCP) phase. In order to dilute the side chain mesogens along the polymer backbone, octyl side chains were also incorporated. X-ray studies confirmed that the resulting co-polysiloxane exhibits a liquid-crystalline layered phase, the siloxane polymer chains being microphase segregated from the incompatible side chain mesogens. The mesophase of polymer exhibits a homeotropic structure that can be successfully aligned by unidirectional shear. This phase does not exhibit polar switching under an applied electric field unlike the bent-core monomer used as the side chains of this polymer. This can be caused by the homeotropic alignment of the polymer samples.

• 出版日期2011-1-18