简介：Fourpolymerscontainingfive-memberedringsinthemainchain,withorwithoutconjugationstructurealongthebackboneandwithorwithoutconjugatedpendentgroups,weredesignedandsynthesizedbymetathesiscyclopolymerizationoffunctionalizedα,ω-diynes,andcyclopolymerizationoffunctionalizedα,ω-dienescatalyzedbytheα-diiminepalladium-basedcatalyst,respectively.Hightomoderatemonomerconversionswereachieved.Chainstructure,molecularweight,andmolecularweightdistribution(MWD)ofthecyclopolymerizationproductswerecharacterizedby1H-,13C-NMR,FTIR,andGPC.Thepolymersshowedregularmainchainstructures,moderatelyhighmolecularweight,andnarrowMWD.Thermalpropertiesandchainstackingbehaviorsofthepolymerswereinvestigatedbydifferentialscanningcalorimetry(DSC)andX-raydiffraction(XRD)aswellasatomicforcemicroscopy(AFM).ThepolymerwithconjugationsysteminboththebackboneandthependentgroupsexhibitedUV-Visabsorptionatamuchlongerwavelengththanthosewiththeconjugationonlyinthebackboneoronlyinthesidegroups.Thepolymerswithconjugatedbackboneneedmorespaceforchainstacking,andtheconjugatedbackbonecausesenhancedsizeofpolymerparticlesassembledfromsolution.Theresultsshowedthatprimarymicrostructuresofthepolymerexertedsignificantinfluencesonthephysicalproperties.