简介：Newacetylenemonomers,6-{[(1-naphthylethynyl-4-phenyl)carbonyl]oxy}-l-phenyl-l-hexyne(1),2,5-diethynylthiophene(3),and4,4′-diethynylbiphenyl(6)weresynthesized.Homopolymerizationof1andcopolycyclotrimerizationsof3and6with1-heptyneandl-octynehavebeenachievedwithWCI6-andTaC15-Ph4Sncatalysts,respectively,givingsolublelineardisubstitutedpolyacetylene(2)andhyperbranchedpolyarylenes(5and8)withhighmolecularweights(upto1.2×105)inhighyields(upto98%).ThestructuresandpropertiesofthepolymersarecharacterizedandevaluatedbyIR,NMR,TGA,UV,photoluminescence(PL),andelectroluminescence(EL)analyses.Allthepolymerspossesshighthermalstabilityandemitstrongbluelightuponphotoexcitation.Theintensityoftheemittedlightisgreaterthanthatofpoly(1-phenyl-1-octyne),awell-knownhighlyluminescentdisubstitutedpolyacetylene.Littleaggregation-inducedredshiftinthePLwasobservedinthethinfilmsofthepolymers.Byconstructingamulti-layerELdevice,highELquantumyield(0.18%)hasbeenachievedin2,whicharethebestresultsforsubstitutedpolyacetylenesattainablesofar.

简介：Carboranebisphenolnovolacs(3and4)weresynthesizedinthepresenceofacidcatalystfromcarboranebisphenols(5and6)andformaldehyde.Furtherepoxidizationofcarboranebisphenolnovolacswithepichlorohydringavecarboranebisphenolepoxynovolacs(1and2).Themolecularweightandepoxyvalueofobtainedresinsweredeterminedusingthemolecularweightoftheirprecursors.Theepoxyvaluesof1and2were0.48and0.52respectively,higherthanthemaximumtheoreticalepoxyvalue(0.45)ofdifunctionalcarboranebisphenolepoxyresins.FTIRandNMRwereutilizedtocharacterize1and2.ThecuringbehaviorswerealsostudiedbyDSCandtheoptimizedcuringconditionswereobtained.TGAanalysisindicatedthatcarboranemoietycouldshielditsadjacentorganicstructuresagainstinitialdecomposition.Ontheotherhand,B―Honcarboranecagecouldreactwithoxygentoformathree-dimensionalnetworklinkedbyB―O―BandB―Cbonds,whichfurtherblockedthemovementofformedradicalsandthusthedegradationprocesswasinhibited.

简介：聚苯乙烯涂的硅石(SiO2@PS)核心壳有大约290nm的平均直径的合成粒子被准备由在在直径的2050nm的-methacryloxypropyltrimethoxysilanegraftedSiO2nanoparticles的表面上的苯乙烯的situ乳剂聚合。在10wt%PS答案的SiO2@PS暂停的Rheological行为和分散稳定性与未经治疗的SiO2的暂停相比，silane修改了SiO2nanoparticles。暂停未经治疗并且silane修改了展出的SiO2明显砍变瘦。SiO2@PS暂停展览砍比暂停更加小的粘性未经治疗并且silane修改了SiO2在低砍率。传播电子显微镜学证明合成粒子能一致地并且稳定地与另外的暂停相比在PS答案分散，暗示PS壳罐头有效地提高与在答案的PS大分子的粒子相容性。

简介：Isotacticpoly(butene-1)(iPB)withsphericalmorphologywassynthesizedsuccessfullywithbulkprecipitationpolymerizationwithoutpost-treatmentoftheproducts.ThebulkprecipitationpolymerizationprocessmadeitpossibleforiPBtobeusedasgeneralplasticduetotheacceptabledecreasedcostcomparedwiththesolutionpolymerizationprocess.TheinfluenceofcatalystresiduesontheagingandthermalstabilityofiPBsynthesizedbybulkprecipitationpolymerizationmethodwasinvestigatedbygelpermeationchromatography,mechanicalperformancetesting,thermogravimetricanalysisandinfraredspectroscopicanalysis.CommercialiPBandthelab-madeiPBwithvariedcatalystresiduecontentswerestudied.TheresultsdemonstratedthatthecatalystresiduesplayedanimportantroleintheagingprocessoftheiPB.Apossiblemechanismofagingpromotionbycatalystresidueswasproposed.