Design of calamitic self-assembling reactive mesogenic units: mesomorphic behaviour and rheological characterization

0483339 - FZÚ 2019 RIV GB eng J - Journal Article
Bubnov, Alexej M. - Cigl, Martin - Machado, A. - Pociecha, D. - Hamplová, Věra - Cidade, M.T.
Design of calamitic self-assembling reactive mesogenic units: mesomorphic behaviour and rheological characterization.
Liquid Crystals. Roč. 45, č. 4 (2018), s. 561-573. ISSN 0267-8292. E-ISSN 1366-5855
R&D Projects: GA ČR GA16-12150S
Institutional support: RVO:68378271
Keywords : functional reactive mesogens * liquid crystals * self-assembling behaviour * nematic * smectic * electrorheological fluids
OECD category: Nano-materials (production and properties)
Impact factor: 3.078, year: 2018

Several calamitic reactive mesogens containing only two benzene rings in the molecular core and with or without lateral substitution by the methyl/methoxy groups have been designed and their mesomorphic behaviour was characterized. The reactive mesogens are aimed for further design of the macromolecular materials like polysiloxane based polymers and elastomers. Beyond the mesomorphic and structural properties, the electrorheological properties within the temperature range of the nematic and smectic A mesophases were studied with and without applied electric field for the selected reactive mesogen. The increase of viscosity was found not to be higher than three times under applied electric field strength of 2 kV/mm. The properties of the newly designed reactive mesogens are discussed in order to contribute to better understanding of the molecular architecture – nano-organization properties relationship of such mesogenic materials.

Permanent Link: http://hdl.handle.net/11104/0278693