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Peoplearerecentlyinterestedonstimuli-induceddeformationsofcrosslinkedliquid-crystallinepolymers(CLCPs),causedbythechangeofmesogenalignmentduringthephasetransitionfromLCtoisotropic,e.g.contraction,bendingandtwisting.Inthispaper,azobenzeneacrylatemonomersanddiacrylatecrosslinkerswithdifferentlengthalkylspacerscontainingornotcantainingalongconjugatedmesogenweresynthesized.AlltheCLCPfilmspreparedshowedtheirTgsaroundroomtemperature,whichenabledthemtogeneratereversiblebendingandunbendingbehaviornearroomtemperatureuponalternateirradiationofUVandvisiblelight.Besides,theCLCPfilmswithalongconjugatedmesogenalsounderwentaphotoinducedbendinginresponsetoshortwavelengthvisiblelightat436nm. |
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