简介：Usingsupportedmulti-componentzincdicarboxylatecatalyst,poly(1,2-propylenecarbonate-co-1,2-cyclohexylenecarbonate)(PPCHC)wassuccessfullysynthesizedfromcarbondioxide(CO_2)withpropyleneoxide(PO)andcyclohexeneoxide(CHO).Theconversionofepoxidesdramaticallyincreasedupto89.7%(yield:384.2gofpolymerpergofZn)withincreasingreactiontemperaturefrom60℃to80℃.Theoptimizedreactiontemperatureis80℃.Thechemicalstructure,themolecularweight,aswellasthermalandmechanicalpropertiesoftheresultingterpolymerswereinvestigatedextensively.WhenCHOfeedcontent(mol%)islowerthan10%,thePPCHCterpolymershavenumberaveragemolecularweight(M_n)rangingfrom102×10~3to202×10~3andmolecularweightdistribution(MWD)valuesrangingfrom2.8to3.5.Incontrasttopoly(propylenecarbonate)(PPC),theintroductionofsmallamountofCHOleadstoincreaseintheglasstransitiontemperaturefrom38.0℃to42.6℃.Similarly,themechanicalstrengthofthesynthesizedterpolymerisgreatlyenhancedduetotheincorporationofCHO.TheseimprovementsinmechanicalandthermalpropertiesareofimportanceforthepracticalapplicationofPPC.

简介：Metalion-imprintedlycrosslinkedchitosanresin1andresin2werepreparedbytheuseofCu^2+andNi^2+astemplateionsandglutaraldehydeascrosslinkingagent,respectively,ThroughinvestigationontheadsorptioncapactiesandbindingconstantsforCu^2+,Ni^2+andCo^2+ionsonchitosanresins,resin1andresin2exhibittheadsorptionselectivityforthemixturesolutionof1L1Cu^2+andNi^2+ions.Theadsorptionselectivityofmetalion-imprintedresinsfortheirtemplateionsinmuchhigherthanthatofuncrosslinkedchitosanresin.

简介：Gasphasereductionofcarbonmonoxidetoformaldehydeandethylenewasfoundinelectrochemicalcellwithaninorganicionexchangerα-Zr(HPO4)2·H2Ousedassolidproton-conductingelectrolyteatroomtemperatureandatmosphericpressure.ThetypeandamountoftheelectroreductionofCOdependonthedifferentmetalelectrodesandcurrentdensities,whichgivesalankbetweenheterogeneouscatalysisandelectrochemistry.

简介：Ourobjectivesweretodevelopanewchemicalmethodforthepolymerizationofpyrrole.CuCl2dissolvedinC2H5OHsolventisprimarilyusedfortheinitiationpolymerizationofpyrrole.ThepolymerswithdifferentyieldandconductivitywereobtainedbyraringtheinitialconcentrationofCu2+.TheinitialconcentrationsofCu2+variedfrom1.2×10-4moleto6.48×10-3moleCu2+with2.16×10-2molepyrrole.Thepolypyrroleobtainedwascharacterizedwithelementalanalyzer,XPS,IRspectroscopy,Four-pointprobeandSEM.

简介：ThispaperintroducedthesynthesisandpropertiesofIERbasedon2-hydroxyethylmethacrylate.ThederivativescontainingDEAE-,CM-,SO3Hgroupswerepreparedandtheirusesinbiochemistrywerestudies.

简介：Thecopolymerizationofp-diethynylbenzene（PDEB）withphenylacetylene（PhA）,4,4’-diethynylbiphenyl（DEBP）orm-diethynylbenzene（MDEB）arestudiedbyvaryingmoleratiosofmonomers.WhenthemoleratiosofPDEB/PhAarelessorequalto1/5,thecopolymersaresolubleandfusible,buttheothercopolymersareinsolubleandinfusible.Theresultsshowthatthegoodsolventofcross-linkedcopolymersisbenzeneandtheirsolubilityparameteris9.15cal0.5.cm（-1.5）.Andtheirswellability（θp）,Hugginsparameter（χ）,density(d425)andtheaveragemolecularweightsbetweencrosslinks（c）aremeasured.Itisfoundthatθpandcofcopolymersaregreaterbutd425islessthanthatofrespectivehomopolymers.IRspectrashowthatthecopolymershavetransoidconfigurationandsmallnumberofunreactedethynylgroupsexistinthecopolymers.Themechanismaboutthepolymerizationoracetylenicderivativesinitiatedby（Ph3P）2PdCl2isdiscussed.

简介：Systematicstudiesonthetreatmentandreuseoftheacidindustrialwatewatercontainingsodium2-Naphthylsulfonate(β-salt)from2-NaphthanolproductionprocessbyND-910resin(madebyself)isreportedinthispaper.Undertheoperationconditionsofinitialβ-saltconcentrationof10000-25000mg/LandinitialCODCrof20000-40000mg/L,theremovalratesofSodium2-NaphthylsulfonateandCODCrareover95%andover89%,respectively.Theeffluentcanbedischargeddirectlyafterbiologicaldegradation.TheworkingsorptioncapacityofND-910Resinforβ-saltisover230g/kg.Analkali-waterwashprocedureisutilizedtoregenerateresinandthereclaimingrateofβ-saltisover98%.

简介：Wastewaterfromproductionprocessof2,3-acidwastreatedbyadsorptionusingmacroporousresinNDA-708.Afteronlyone-steptreatmentbyresinadsorption,removalefficiencyofthreekindsofnaphthalenechemicalswasabove99%;removaleficiencyofCODcrwasabove96%.Underproperoperatingcondition,desorptionefficiencywasaround100%.Therunningrecordsoftheindustrialfacilityshowedthatthenaphthlenechemicalsindesorptioneffluentcouldbereusedwithoutobviousinfluenceonthequalityoftheproduct.

简介：

简介：

简介：Usingpolyvinylalcohol(PVA)asrawmaterialandvacuumpumpoilasoilphasemedium,PVA-basedmicrocarrierswerepreparedbysuspensionmethodThediametersofthebeadswere100-180μm.LO2cellswereculturedonPVA-basedmicrocarriersandcytodexⅢmicrocarriers.Morphology,attachmentandgrowthrateofLO2cellswerestudied.

简介：TiO_2-coatedpolystyrenenanoparticleswerepreparedinasimpleway.First,functionalPSparticlesweresynthesizedbycopolymerizingonekindofpolymerizablesurfactantwithstyrene.Thenthestabledispersionsofpolystyrenenanoparticleswereusedastemplates,andpolystyrenenanoparticleswerecoatedwithtitaniabyinsituhydrolysisoftetra-n-butyltitanate(TBT).Nosurfacetreatmentandcentrifugation/redispersioncycleprocesswereneededduringthewholeexperiment.IsolatedPSsphereswithuni...

简介：Fourkindsofpalladiumcatalystsdispersedonpoly-N-vinyl-2-pyrrolidonewerepreparedbyusingCH3OH-NaOH,NaBH4,H2OorCH3OH-H2Oasthereducingagentintheprocessofcatalystpreparation.ThecatalystswerecharacterizedbyXPS,TEM,XRDandusedforthehydrogenationofmethylacrylate.Itwasfoundthatthevalencestateofpalladiumanddistributionofpalladiumparticlesaswellasthehydrogenationrateweregreatlyaffectedbythereducingagent.ThebestevenlydispersedpalladiumcatalystshowinghighhydrogenationactivitywaspreparedusingCH3OH-NaOHasthereducingagent.

简介：Anewkindofmonomerswassuccessfullysynthesizedbythereactionbetween2-chloromethylcycloketalandtrimethylsilylcyanide,followedbyringclosureanddehaiogenation.Polymerizationsofthemonomerswerecarriedoutinbenzenesolutionat80℃withbenzoylperoxideasinitiator.BoththestructuresofmonomersandpolymerswerecharacterizedbyIR,1HNMR,13CNMRandelementalanalysis.

简介：DistributionofmetalsonPd-SnO2/D3520catalystsandstateofthecatalystswrerstudiedwithSEM,XRD.TheinteractionbetweenmetalsandsupportorbetweenPdandSnorPbwerestudiedbyIR,XPS.Inaddition,therelationshipoftheactivityforcatalytichydrogenationoftheolefinsandouterlayervalenceelectrondensityofPdwasdiscussed.Theresultsshowedthatthesecatalystshadsuitablesurfacestate,themetalswereuniformlydispersedonthesurfacelayerofthesupport.Therewerenotobviousinteractionbetweenthemetalsandthesupport.TherewasstronginteractionbetweenPdandSn(orPb)inthecatalysts.ThecatalyticactivityforhydrogenationwasrelatedtoouterlayervalenceelectrondensityofPd.

简介：DistributionofmetalsonPd-SnO2/D3520catalystsandstateofthecatalystswerestudiedwithSEM,XRD.TheinteractionbetweenmetalsandsupportorbetweenPdandSnorPbwerestudiedbyIR,XPS.Inaddition,therelationshipoftheactivityforcatalytichydrogenationoftheolefinsandouterlayervalenceelectrondensityofPdwasdiscussed.Theresultsshowedthatthesecatalystshadsuitablesurfacestate,themetalswereuniformlydispersedonthesurfacelayerofthesupport.Therewerenotobviousinteractionbetweenthemetalsandthesupport.TherewasstronginteractionbetweenPdandSn(orPb)inthecatalysts.ThecatalyticactivityforhydrogenationwasrelatedtoouterlayervalenceelectrondensityofPd.

简介：

简介：TheNdCl3/MgCl2bisupportedcatalystwaspreparedbyusingNdCl3,MgCl2,（CH3）2（CH2）2OHandTiCl4.ItisshownthatthestructureofbisupportedcatalystwasdifferentfromthoseofeitherNdCl3orMgCl2singlesupportedcatalyst.Apeculiartypeofkineticcurveforethylenepolymerizationwasfound.

简介：Polyfluoroalkylsubstituted2-hydroxyethylacrylate6wassynthesizedinsixstepsusingglycerolasastartingmaterial.Apreliminaryinvestigationhasbeentakenonthesynthesisandcharacterizationofcopolymersof6and2-hydroxyethylmethacrylate.

简介：