简介：Thegoalofthispaperwastorevealthefeasibilityofchloromethylationofpolymersmadefromtechnicaldivinylbenzenesoastointroducefunctionalgroupsintopolymericadsorbents.Forthisstudy,thefactorsthateffectthechloromethylationreaction,suchastheporestructureofthepolymer,theratioofthereactantstocatalyst,thereactiontemperatureandreactiontimeandsoonwereinvestigated,andtheporestructureandpropertyofthechloromethylatedpolymerswerestudiedTheresultsshowedthatpolymersoftechnicaldivinylbenzenecouldbechloromethylatedsuccessfully,andtheadsorptivepropertyofthechloromethylatedresinwasdifferentfromthatoftheinitialresin.

简介：Wedevelopanacoustomechanicaltheoryforsemicrystallinepolymersanddemonstratethatacousticradiationforceiscapableofcausinggiantdeformationinthesematerials.Whenapolymerlayerissubjectedtocombinedtensilemechanicalforceinplaneandacousticforce(soundpressure)throughthickness,itbecomesinitiallyhomogeneouslythinbutsooninhomogeneouswhenthetwoforcesreachcriticalconditions.CriticalconditionsforsuchacoustomechanicalinstabilityaretheoreticallydeterminedbasedontheJ2-deformationtheory.Wedemonstratethatpull-ininstabilitycanbeacousticallytriggeredevenifthein-planemechanicalforceisfixed.Bifurcationinthecriticalconditionforacoustomechanicalinstabilityoccurswhenthepolymerexhibitssufficientlylargehardening.Thefindingsofthisstudyenablereliabilitydesignofnovelacousticactuateddevices.

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简介：BasedontheX-rayscatteringintensitytheory,thecorrectionfactorsofthedegreeofcrystallinityformulaeofthemulticomponentpolymershavebeenclearlydefined.TheformulaeofthedegreeofcrystallinityofthemulticomponentpolymerswerederivedintermsofWAXDtheoryandimprovedgraphicmultipeakresolutionmethods.Theresultscalculatedaresatisfactoryincomparisonwiththedensitymeasurement.

简介：UnderthesponsorshipoftheInternationalUnionofPureandAppliedChemistry(IUPAC)andChineseChemicalSociety,theInternationalConferenceonLiquidCrystalPolymerswasheldattheTwenty-FirstCenturyHotel,BeijingChina,in6-9September1994.TheconferenceChair-manandSecretarygeneralwereProfessorsQ.F.ZhouofPekingUniversityandX.J.Wangof

简介：LighttransmissionspectraofTHFsolutionsofpoly(C60-co-methylmethacrylate)sandpoly(C60-co-styrene)scontinuouslyred-shiftwithincreasingconcentration.Formationoffullerenenanoclustersmayberesponsiblefortheunusualspectralshiftwithconcentration.Ithaslongbeenscientists’dreamto'tune'material’spropertiesbysimplemeans,andtheC60-containingpolymersrepresentsuchagroupofnovelmaterialswhoseopticalpropertiesarepredictablyandreversiblytunablebyasimplechangeinconcentration.

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简介：Anewmethacrylamidemonomer,hexylaminemethacrylamide(MAHA),wassynthesizedandusedinpolymerizations.ThehomopolymerofMAHAanditscopolymersweresynthesizedbyfreeradicalpolymerizationtechniqueswithN-isopropylacrylamide(NIPAAm)intwodifferentcompositions.Thequaternizationofthehomopolymerandcopolymerswerecarriedoutusing1-bromopropane.ThecopolymerswithNIPAAmandalowMAHAcontentshowedtemperature-responsivebehaviorinanaqueousenvironment.Thelowercriticalsolutiontemperatures(LCSTs)ofthesepolymersvariedbetween32℃and44℃.TheLCSTsofquaternizedcopolymerswerehigherthanthoseofneutralcopolymersbecausetheyweremorehydrophilic.TheobtainedhomopolymersandcopolymersweretestedforantibacterialactivitiesagainstS.aureusandE.coli.Thequaternizedwater-solublecopolymersshowedantibacterialactivitiesagainstS.aureus.Thequaternizationresultedinthesynthesisofbothantibacterialandtemperature-responsivecopolymers.

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简介：Throughinterfacialpoly-condensationofR2SnCl2(R=Me,Bu)withvariousdiacids,diphenols(diols),diamines,amino-acids,hydroxyacids,urea,orthiourea,aseriesoforgano-tinpoly-esters,poly-ethers,poly-amines,poly-amine-esters,poly-ureas,poly-thioureaswereprepared,andcharacterisedaltogethertotalling100polymers,amongwhich91arepreviouslyunreported.ThesynthesizedpolymershaveapotentialasathermostabilizerinPVCproducts.

简介：Molecularimprintedpolymers(MIPs)arenovelfunctionalpolymermaterialsandknownasspecificadsorbentsforthetemplatemolecules.Thesenovelfunctionalpolymershavepromisedpotentialapplicationsinracemicresolution,sensor,chromatography,adsorptiveseparationandotherfields.ThisreviewexhibitstheapproachforpreparingMIPs,thefeaturesofMIPsobtainedbydifferentroutesandthecharacteristicsofadsorptiveseparationswithMIPs.Themolecularrecognitionmechanismandtheideaofthepresentpossibilitiesandlimitationsofmolecularimprintingpolymerizationarediscussedaswell.

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简介：Apreliminaryinvestigationonshort-wavelengthablationmechanismsofpoly(methylmethacrylate)(PMMA)andpoly(1,4-phenyleneetherether-sulfone)(PPEES)byextremeultraviolet(EUV)radiationat13.5nmusingatable-toplaserproducedplasmafromagas-pufftargetatLLG(Gttingen)andat46.9nmbya10HzdesktopcapillarydischargelaseroperatedattheInstituteofPhysics(Prague)ispresented.Ablationofpolymermaterialsisinitiatedbyphotoinducedpolymerchainscissions.TheablationoccursduetotheformationofvolatileproductsbytheEUVradiolysisremovedasanablationplumefromtheirradiatedmaterialintothevacuum.Ingeneral,cross-linkingofpolymermoleculescancompetewiththechaindecomposition.Bothprocessesmayinfluencetheefficiencyandqualityofmicro(nano)structuringinpolymermaterials.WavelengthisacriticalparametertobetakenintoaccountwhenanEUVablationprocessoccurs,becausedifferentwavelengthsresultindifferentenergydensitiesinthenear-surfaceregionofthepolymerexposedtonanosecondpulsesofintenseEUVradiation.

简介：PolymerPhysicsLaboratory,InstituteofChemistry,TheChineseAcademyofSciences,Beijing100080,China

简介：INTRODUCTIONIn1976,AlanMacDiarmid,HidekiShirakawaandI,togetherwithatalentedgroupofgraduatestudentsandpost-doctoralresearchersdiscoveredconductingpolymersandtheabilitytodopethesepolymersoverthefullrangefrominsulatortometal[1,2].Thiswasparticularlyexcitingbecauseitcreatedanewfieldofresearchontheboundarybetweenchemistryandcondensedmatterphysics,andbecauseitcreatedanumberofopportunities:

简介：Cationic聚合物作为非病毒的基因向量一直在收到许多注意。水的活动阶段为尺寸排除与ShodexOHpakSB列在联合被优化层析(秒)分析包含二硫化物(乙烯imine)(PEI)poly，衍生物在基因交货使用了。在活动阶段的acetonitrile的增加被显示能压制在聚合物analytes和静止阶段之间的恐水病的相互作用。cationic聚合物的绝对分子的重量和分布从联机SEC-MALS(散布的多角度光)直接被决定/RI(折射索引察觉者)。结果证明在基因交货使用，小乐队拓宽的包含二硫化物的PEI衍生物的好秒分离被完成。

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简介：Inthispaper,anartificialneuralnetworkmodelisadoptedtostudytheglasstransitiontemperatureofpolymers.Inourartificialneuralnetworks,theinputnodesarethecharacteristicratioC∞,theaveragemolecularweightM,betweenentanglementpointsandthemolecularweightMmonofrepeatingunit.TheoutputnodeistheglasstransitiontemperatureTg,andthenumberofthehiddenlayeris6.Wefoundthattheartificialneuralnetworksimulationsareaccurateinpredictingtheoutcomeforpolymersforwhichitisnottrained.Themaximumrelativeerrorforpredictingoftheglasstransitiontemperatureis3.47%,andtheoverallaverageerrorisonly2.27%.Artificialneuralnetworksmayprovidesomenewideastoinvestigateotherpropertiesofthepolymers.

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简介：电容表演poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT-PSS)超分子的hydrogels系统地被调查了。材料显示出67F/g的一个特定的电容并且在周期的voltammogram大小象5000mV/s一样高以扫描率显示优秀的率能力，由好周期稳定性伴随了。根据microscale形态学，特定的区域和电的传导性的大小，为电气化学的性质的改进的机制被讨论并且归功于到hydrogels的新奇多孔的微观结构和僵硬PEDOT和软PSS部件的合作效果。而且，polyaniline(平底锅)通过一个界面的聚合过程与PEDOT-PSShydrogels被加重，赋予hydrogel材料以以5000mV/s的扫描率的160F/g的一个更高特定的电容。这个工作的意义躺在一个新奇方法的示范解决在电气化学的应用进行聚合物的问题。