简介：包括的有效策略弄短，链扩展，积极的组介绍和同类的反应战术，被采用与纤维素醋酸盐(CA)修改多围的碳nanotubes(MWNT)。由利用2,4,6-trichloro-1,3,5-triazine，特殊，MWNT(MWNT-triazine)的反应中介被获得。MWNT-triazine的合适的溶解度帮助让同类的修正成为现实。在在MWNT-triazine和氢氧根的氯化物原子之间的那反应在CA组织的进一步验证的详细描述贡献了MWNT-CA的形成结合。新奇MWNT-CA由碳(76.3%)组成，氧(18.4%)和氮(5.3%)。与42.8wt%的一个依附nanotube的CA内容，MWNT-CA在DMSO，NMP，DMF和DMAc是容易地可溶的。CA-based修正线路的证实可能导致为特定的吸着和隔离瞄准的研究。

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简介：Thereactivityratiosofthetrinarysystemoftriallylisocyanurate,divinylbenzeneandvinylacetatewrerecalculatedfromtheQandevaluesdeterminedbyotherinvestigators.Accordingtotheseratios,theterpolymerizationofthesemonomerswaspredictedpossibleandthepolymerizationwascarriedoutbysuspensionpolymerizationwithtolueneandgasolineasextenders,formingsphericalmacroporousterpolymers.Theinfluencesoftheamountoftheextendersandthecrosslinkingdegreeontheporepropertitieswerestudied.Theresultshowedthatunderadequatereactionconditions,thispolymerizationsystemcouldproducemacroporouscopolymerswithveryhighsurfacearea(>1000m^2/g)whichhaveneverbeenobtainedinotherpolymerizationsystemusingsilimarpolymerizationtechnique.Thiswasmostprobablycausedbytheformationofsomelinearorbranchedpoly(vinylacetate)duringthepolymerizationprocessbecauseofthepoorcopolymerizingabilityofvinylacetate.Thislinearorbranchedpolymeractedasanextenderandformedatrinaryporeporducingreagentwithtolueneandgasoline.

简介：Twokindsofrhodiumcatalystssupportedoncross-linkedstyrene-divinylbenzenecopolymerscontainingbipyridineoro-phenylenediaminehavebeenpreparedandfoundtodisplayhighactivityformethylacetatecarbonylationtoformaceticanhydride,theactivitiesareevenhigherthantheirhomogeneouscounterparts.XPSanalysiswasusedtocharacterizethesyntheticcatalysts.TheapparentactivationparametersweredeterminedtobeEα=73.3KJ/mol,ΔH^≠=66.3KJ/mol,ΔS^≠=-28.6eu.Theseparametersareveryclosetothoseinmethanolcarbonylationandimplytohaveanalogousmechanisminbothcases.

简介：Theeffectofvinylacetate(VA)contentinethylenevinylacetate(EVA)copolymeronthemechanicalpropertiesofpolypropylenewasinvestigated.ThreedifferentEVAcopolymerswithconcentrationsof3wt%,6wt%,9wt%,12wt%and15wt%,wereblendedtopolypropylene.Themechanicalpropertiessuchasyieldandtensilestrengths,elasticmodulus,Izodimpactstrength,hardnessandmeltflowindexoftheblendswereinvestigated.Relationshipbetweentypeofvinylacetateandconcentrations,mechanical,MFIandmorphologicalpropertieswereexplored.

简介：Associationbehaviorofethylenevinylacetate（EVA）copolymerinfoursolvents1,2-dichloroethane（DCE）,cyclohexane（CYH）,xylene（XYL）andchloroform（CF）hasbeeninvestigatedbydilutesolutionviscometryThecriticalassociationconcen-tration（CA）wasdeterminedatwhichtheincipientdecreaseinslopeoftheηsp/C～Ccurveinsolutionsatthediluteregime.OurresultsshowedthatwhethertheCAcouldexistdependsonsolventproperty.ThevaluesofCAinDCEincreasewithincreasing,oftemperatureandvinylacetate（VA）contentinEVAanddecreasingofmolecularweightofEVA.

简介：Inthispaper,blendmembranesfrompolyvinylacetate(PVAc)andblockcopolymerpoly(amide-12-b-ethyleneoxide)(Pebax1074)arepreparedbysolutioncastingandsolventevaporationmethod.Althoughtheyarehomogeneousonamacro-scale,theobservationsfromDSCandSEMindicatemicro-phaseseparationforPVAc/Pebax1074blendmembranes.WiththeincreaseofPebax1074content,gaspermeabilitiesofCO2,H2,N2andCH4allincreasegreatly.PVAc/Pebax1074blendmembraneswithhighPVAccontentareappropriateforCO2/CH4separation.Thetemperaturedependenceofgaspermeabilityisdividedintorubberyregionandglassyregion.Theactivationenergiesofpermeationinrubberyregionaresmallerthanthoseinglassyregion,andtheyalldecreasewithincreasingPebax1074content.ForN2,H2andCH4,theirgaspermeationpropertiesaremainlyinfluencedbythedual-modesorptionandhydrostaticpressureeffect.ButforCO2,itspermeabilityincreaseswiththeincreaseofpressureduetoCO2-inducedplasticizationeffect,whichismoreobviousforPVAc/Pebax1074blendmembraneswithhighPVAccontent.

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