Effect of co-monomers’ relative concentration on self-assembling behaviour of side-chain liquid crystalline elastomers

0434554 - FZÚ 2015 RIV GB eng J - Journal Article
Domenici, V. - Milavec, J. - Bubnov, Alexej - Pociecha, D. - Zupančič, B. - Rešetič, A. - Hamplová, Věra - Gorecka, E. - Zalar, B.
Effect of co-monomers’ relative concentration on self-assembling behaviour of side-chain liquid crystalline elastomers.
RSC Advances. Roč. 4, č. 83 (2014), s. 44056-44064. E-ISSN 2046-2069
R&D Projects: GA ČR GA13-14133S
Grant - others:AVČR(CZ) M100101204; AVČR(CZ) M100101211
Institutional support: RVO:68378271
Keywords : liquid crystal elastomers * nematic * smectic A * NMR * X-ray diffraction * DSC * thermo-mechanic properties * elastic properties * phase diagram
Subject RIV: JJ - Other Materials
Impact factor: 3.840, year: 2014

This work deals with the synthesis and chemical-physical characterization of a new series of liquid crystalline elastomers (LCEs) in the form of monodomain films, showing the nematic and smectic A phases. The synthesis, mesomorphic characterization and 2H NMR study of two constituent mesogens is reported, as well as the preparation of monodomain and polydomain polysiloxane-based side-chain LC elastomers containing different concentrations of the two mesogens and a constant crosslinking density of 15%. The phase diagram and mesomorphic behaviour of these new liquid crystalline elastomers were determined by DSC, POM and X-ray diffraction studies. Thermo-mechanic curves confirmed the shape-memory properties of these films, which have elastic properties optimal for applications as thermo-mechanic actuators.
Permanent Link: http://hdl.handle.net/11104/0238566