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简介：Thesurfaceofpolypropylene(PP)membranewasmodifiedbylowtemperatureplasmawithammonia.Theeffectofexposuretimewasinvestigatedbymeansofcontactanglemeasurement.Theresultsshowthatlowtemperatureammoniaplcsmatreatmentcanenhanceitshydrophilicity.Chinesehamsterovary(CHO)cellsattachmentonthemodifiedmembranewasenhancedandthegrowthrateonthemembranewasfasterthanunmodifiedone.

简介：Sm(Ⅲ）wasquantitativelyadsorbedbyaminomethylenephosphonicacidresin(APAR)inthemediumofpH=5.0,Thestaticallysaturatedsorptioncapacityis251mg/g.resin.Sm(Ⅲ）adsorbedonAPARcanbereductivelyelutedby2.0mol/LHCl.Thesorptionrateconstantisk298=1.35×10^-5s^-1.ThesorptionbehaviorofAPARforSm(Ⅲ）obeystheFreundlichisotherm.TheenthalpychangeΔH°ofsorptionis24.9kJ/mol.TheapparentactivationenergyisEa=11.7kJ/mol.ThesorptionmechanismshowsthatthenitrogenandoxygenatomsofthefunctionalgroupofAPARcoordinatedwithSm(Ⅲ）toformcoordinationbond.

简介：TheinfluencesofboththevolumeofPS/toluenesolutionintheUbbelohdeviscometerandtheprecisionofthetimemeasuringontheviscositybehaviorindiluteandextremelydiluteconcentrationregionareinvestigatedItwasfoundthattheinfluenceoftheformercanneglect,butthatofthelatterissoprominentthatthedatafluctuatebitterlyandlinearityofthecurveofthereducedviscosityvs.Concentration(ηsp/c～c)becomestoobadtoobeytheHugginsequationdowntotheextremelydiluteregion,despitetheerroroftheflowtimes△t≤0.2s,whichispermittedbytheconventionalmethodofviscositymeasurement.Throughstrictmathematicalanalyses,itwasfoundthatthcerror(E)ofthereducedviscosityisinproportionandinverseproportionto△tandconcentrationc,respectively.Sothelesstheconcentration,themoretheerroris.Consequently,alowestconcentrationlimitcLcorrespondingtogivenexperimentalerrormayexistanditwillbemeaninglessforfurtheroperationbelowcLbecauseofthegreatfluctuationofthedata.Therefore,itneedstoseriouslyreconsidertheapplicationoftheconventionalmethodofUbbelohdeviscositymeasurementintheextremelydilutepolymersolutionundertraditionalconditionsbecauseofthegreatinfluenceoftheexperimentalerror.

简介：ThepotentiometricbehaviorofthechelatingionexchangeresinD751containingiminodiaceticacidgroupshasbeenstudiedat25℃bybatchtitrationwithalkaliandacidinwaterandinethanol-watermixturesolvent.Thetitrtioncurves,theamountofchemicallyboundcounter-ionsandinvasiveelectrolytesintheresinphase,andthesolventcontentstheresinhavebeeninvestigated.

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简介：TheconductivitybehaviorofAl(OH)3-acrylamidehybridpolyacrylamide(hybridPAAm)indistilledwaterwasstudied.Adiscontinuityphenomenonoftheconductivity(k)versusconcentration(c)curveofthehybridPAAminacertainconcentrationregimeisfound.ThisphenomenonisdependentonthemolecularweightofthehybridPAAmandontheparticlesizeandcontentoftheAl(OH)3colloidinthehybridPAAm.ThisphenomenonwasaccountedforassumingionizationofthehybridPAAm.

简介：Copolymerofstyrene-divinylbenzeneinbeadfromwasmadebysuspensionpolymerization.Afterchloromethylationandamination,fivekindsofpolymericamineswerethusobtained.Thesepolymerswerereactedwithpalladiumchloride,andwerethenreduced.Thepolymer-supportedcatalystssynthesizedabovewereusedtocatalyzetheselectivehydrogenationofmesityloxideunderreactionconditionsof80℃and10kg/cm^2,usingmethanolasasolvent.ThecatalyticactivityandMIBK(methylisobutylketone)formationselectivityofthecatalystswereexamined.

简介：Thethermallystimulatedshapememorybehaviorofethyleneoxide-butyleneterephthalate(EOBT)segmentedcopolymerswithdifferentsoftsegmentmolecularweightandhardsegmentcontentwasinvestigated.ThedeformationrecoveryratioR_foftheEOBTsamplesincreaseswiththesoftsegmentmolecularweightandthehardsegmentweightcontent,whiletheaverageoveralldeformationrecoveryspeedV_rincreaseswiththehardsegmentcontent.Thetemperatureofmaximumdeformationrecoveryspeed(T_M)isdeterminedbythemeltingtemperatureofthesoftsegmentcrystalsandthestabilityofthecrystallizedhardsegmentdomains.

简介：Thechemistryofthethiacrowns,especially,ofthepolymer-supportedthiacrowns,hasnotbeendevelopedtotheextendofthecrownsorazacrowns.Veryfewfunctionalizedthiacrowncompundshavebeenprepared.Nopaperconcerningthepolymer-supportedthiacrownsplatinumcomplexesandtheircatalyticbehaviorhasbeenpublishedyet.Inthispaper,thesynthesisoffumedsilica-supportedpolyundecyloxymethyl-1,4-dithia-7,10,13-trioxacyclopentadecanesiloxaneandsilica-supportedpoly-undecyloxymethyl-1,4-dithia-7,10,13,16-tetraoxacyclooctadecanesiloxane,aswellastheirplatinumcomplexes,andthecatalyticactivityofthecomplexesforthehydrosilylationofolefinswithtriethoxysilanearereported.

简介：TherecoveryofAubyactivatedcarbonfibers(ACFs)wascarriedoutina40mmdiameter,1200mmheightfluidizedbedTheratesofreactionofthefunctionalfiberswithAu3+inthepureaurumsolutionandintheaurum-containingwastewaterweremeasuredrespectivelyatthedifferentsolutionfiowrates,andcomparedwiththeresultsunderthestaticsolutionconditions.Experimentalresultsindicatedthatthereactionratesinfluidizationarenotablyhigherthanthoseinthestaticstateandincreasewiththeincreaseofsolutionflowrate.Itdemonstratesthatthethicknessoftheconcentrationboundarylayerisdecreasedandauniformtemperaturefieldisestablishedinthebedduetoincreasingoftheturbulentextentwiththerelativefiber/solutionvelocity.

简介：Thepolymerizationofethylenebytwoiron-basedcatalysts,{[2,6-ArN=C（Me）2C5H3N]FeCl2}（Ar=2,6-C6H3-Me21;2,6-C6Hv3（i-Pr）v2Ⅱ）hasbeeninvestigated.CatalystⅡproduceshighermolecularweightpolyethylene（PE）andbroadenedpolydispersitiesrelativetocatalystⅠunderanalogousconditionsandallpolymersarelinear.Thekineticprofileswithironcatalystsshowedasmoothpatternduringbothratebuild-upandratelowering,whicharedifferentfromthemetallocenecatalysts.ThepolymerizationactivityincreaseswithAl/Fevalueandanoptimumtemperaturerangeat40～45℃wasobserved.ThemolecularweightofPEdecreaseswiththeincreaseofAl/Feratioandriseofpolymerizationtemperature.

简介：Poly(styrene-glycidylmethacrylate)particleshavingbowl-shapedhollowstructuresweresynthesizedbyswollenseedemulsionpolymerization.ThePSemulsionsynthesizedthroughsoap-freeemulsionpolymerizationwasswollenbytoluene,andthenthemixtureofsecondmonomerswasaddedunderpolymerizationcondition.Soathinshellofpoly(styrene-glycidylmethacrylate)cross-linkedbytriethyleneglycoldiacrylatewasformedaroundtheswollenPSparticle.Thebowl-shapedparticleswereobtainedafterthecollapsingofthethinshellwhenthetolueneemanatedfromtheparticles,buttheshapeswereeffectedbythedegreesofcross-linking.TheshapeoftheparticleswasobservedbySEM.ThereleasebehaviorofsolventfromtheparticleswasexaminedbyTG.

简介：Polymerizationofthreecyclicketeneacetals:i.e.,5,6-benzo-2-methylene-1,3-dioxepane(BMDO),2-methylene-4-phenyl-1,3-dioxolane(MPDO)and4,7-dimethyl-2-methylene-1,3-dioxepane(DMMDO)werecarriedoutinthepresenceofethylα-bromobutyrate/CuBr/2,2'-bipyridinerespectively.Thestructuresofpoly(BMDO),poly(MPDO)andpoly(DMMDO)werecharacterizedby1Hand13C-NMRspectra.Theeffectsofmonomerstructureonthebehaviorofatomtransferfreeradicalring-openingpolymerizationwereinvestigatedandthemechanismofcontrolledfreeradicalring-openingpolymerizationwasdiscussed.

简介：ThecomplexresinspreparedfrommacroporoussulfonatedresinD72(H^+form)withferricchlorideorferricchloridehexahydratehavebothsitesofBronstedacidandLewisacid.Inthecatalysisofexterificationofaceticacidwithbutanolthecomplexresinsshowtohavemuchhighercatalyticactivitythanthatofitsmatrix.aconventionalsulfonatedcationexchangeresinD72.

简介：Theadsorptionbehaviorofionicgoldontochelatingfibercontainingamidoximegroupswasinvestigated.ThechelatingfiberpresentshighadsorptioncapacityforionicgoldAu^3+（upto626mg/g,whenthecontentofamidoximegroupreaches7.59mmol/g),andpossessestheabilitytoreducetheAu^3+intometallicgold,Intheredoxprocess,theamidoximegroupisoxidizedintocarboxylgroup.

简介：ThesorptionbehaviorofN-methyl-2-thio-imidazoleresin(MTIR)forRh(Ⅲ）wasinvestigated.TheoptmumsorptionconditionofMTIRforRh(Ⅲ）,sorptionratet1/2=84min,sorptioncapacity1.37mmolRh(Ⅲ）/gMTIR,[140.5mgRh(Ⅲ）/gMTIR],sorptionmolarratio0.34Rh(Ⅲ）/functionalgroup,distributioncoefficientD=2.5×10^3mg·g^-1weredetermined.ThesorptionselectivityofMTIRforRh(Ⅲ）inthepresenceofcommonmetalions,Fe^3+,Co^2+,Ni^2+andCu^2+wasexamined.Rh(Ⅲ）adsorbedonMTIRcanbeelutedquantitativelybyusingamixedsolutioncomposedof20%thio-urea-acetone:6molHCl.dm^-3(1:1vol.)usedasaneluent.Rh(Ⅲ）canbeseparatedfromthemixtureofRh(Ⅲ）andFe^3+,Co^2+,Ni^2+,Cu^2+byusingD72resinandMTIRsuccessively.

简介：Blendsofpoly(3-hydroxybutyrate-co-3-hydroxyhexanoate)(PHBHHx)andpoly(butylenesuccinate-adipate)(PBSA),bothbiodegradablesemicrystallinepolyesters,werepreparedwiththeratioofPHBHHx/PBSArangingfrom80/20to20/80bymeltmixingmethod.Differentialscanningcalorimetry(DSC),thermogravimetryanalysis(TGA),dynamicmechanicalthermalanalysis(DMA),polarizingopticalmicroscopy(POM)andwideangleX-raydiffractometer(WAXD)wereusedtostudythemiscibilityandcrystallizationbehaviorofPHBHHx/PBSAblends.ExperimentalresultsindicatethatPHBHHxisimmisciblewithPBSAasshownbythealmostunchangedglasstransitiontemperatureandthebiphasicmelt.

简介：Asidechainliquidcrystallinecopolysiloxane,whichwouldshowelectro-opticeffectsasknownfromlowmassliquidcrystal,wassynthesizedbyhydrosilylationreaction,andthetwohomologousmonomerswithdifferentlengthspacerscontainingSchiff’sbasemesogenwith—NO2terminatedgroupweregraftedtoapolysiloxanemainchain.Residualmonomerincrudeproductiseffectiveinreinforcingtheresponsetoanelectricfieldoverthatofpurepolymericliquidcrystal.