Kinetics of Ordering and Deformation in Photosensitive Azobenzene LC Networks

dc.bibliographicCitation.firstPage531
dc.bibliographicCitation.issue5
dc.bibliographicCitation.volume10
dc.contributor.authorToshchevikov, Vladimir
dc.contributor.authorPetrova, Tatiana
dc.contributor.authorSaphiannikova, Marina
dc.date.accessioned2023-01-26T09:27:03Z
dc.date.available2023-01-26T09:27:03Z
dc.date.issued2018
dc.description.abstractAzobenzene-containing polymer networks are unique compounds that are able to change their shape in response to light, which makes them prospective materials for photocontrollable nano-templates, sensors, microrobots, artificial muscles, etc. In present work, we study the kinetics of light-induced ordering and deformation in two-component polymer networks containing optically inert liquid crystalline (LC) mesogens and azobenzene chromophores. By this, we generalize our previous theory [J. Phys. Chem. Lett. 2017, 8, 1094–1098] devoted to the kinetics of photoizomerization in one-component azo-polymers without mesogenic inclusions. The kinetic equations of photoisomerization are used, taking into account the angular selectivity of the photoisomerization with respect to the polarization direction of the light E. After multiple trans-cis-trans photoisomerization cycles, the azobenzenes are reoriented preferably perpendicular to the vector E. This changes the ordering of the mesogens due to the orientational LC interactions between the components. The light-induced reordering is accompanied by network deformation. Time evolution of ordering and deformation is found as a function of the intensity of light and structural parameters of the LC azo-networks, which define the viscosity, the strength of the LC interactions between the components, the volume fraction of the azobenzene moieties, and the angular distribution of azobenzenes in polymer chains. Established structure-property relationships are in agreement with a number of experimental data.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/11079
dc.identifier.urihttp://dx.doi.org/10.34657/10105
dc.language.isoeng
dc.publisherBasel : MDPI
dc.relation.doihttps://doi.org/10.3390/polym10050531
dc.relation.essn2073-4360
dc.relation.ispartofseriesPolymers 10 (2018), Nr. 5
dc.rights.licenseCC BY 4.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectKineticseng
dc.subjectLiquid crystalseng
dc.subjectPhotodeformable polymerseng
dc.subjectPolymer networkseng
dc.subjectStatistical physicseng
dc.subject.ddc540
dc.titleKinetics of Ordering and Deformation in Photosensitive Azobenzene LC Networkseng
dc.typearticle
dc.typeText
dcterms.bibliographicCitation.journalTitlePolymers
tib.accessRightsopenAccess
wgl.contributorIPF
wgl.subjectChemieger
wgl.typeZeitschriftenartikelger
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