Sánchez-Ferrer, Antoni Finkelmann, Heino 2009-09-11 A novel crosslinked smectic-C Main-Chain Liquid-Crystalline Elastomer (MCLCE) has been synthesized by polycondensation of vinyloxy-terminated mesogens, tetramethyldisiloxane and pentamethylpentaoxapentasilecane. The introduction of the functional vinyloxy group allows the synthesis of well-defined networks having low soluble content and good mechanical properties. Networks having a macroscopic uniformly ordered director and a conical distribution of the smectic layer normal with respect to the director are mechanically deformed by uniaxial and shear deformations. Under uniaxial deformations two processes were observed: parallel to the director the mechanical field directly couples to the smectic tilt angle while perpendicular to the director a reorientation process takes place. A shear deformation parallel and perpendicular to the director causes a uniform layer orientation and the network exhibits a smectic-C monodomain phase having a macroscopic uniform director and layer orientation. This process is reversible for shear deformation perpendicular and irreversible by applying the shear force parallel to the director. application/pdf https://folia.unifr.ch/global/documents/301244 https://folia.unifr.ch/documents/301244/files/sanchez_mds.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1080/15421400903065879 info:eu-repo/semantics/openAccess License undefined Molecular Crystals and Liquid Crystals. - 2009, p. 357-366 info:eu-repo/classification/udc/53 Mechanical deformations in smectic-C main-chain liquid-crystalline elastomers http://purl.org/coar/resource_type/c_6501