简介：

简介：Thephotopolymerizationoftwokindsofprepolyesterscontainingconjugateddiacetylene(PDA-6andPDA-12)wasinvestigatedusingDSC.BymeasuringtheendothermicenthalpyoftheprepolymersafterdifferentUV-irradiationtimes,thepolymerizationswerefoundtofollowthefirst-orderratelawwhichagreedwiththeresultsofotherinvestigatorsusingadifferentmethod.TheendothermicenthalpymeasurementsofPDA-6andPDA-12beforeUV-irradiationprecludedthepossibilitythatthedecreaseofendothermicenthalpywascausedbythermalpolymerization.

简介：TheenzymatichydrolysisofmacromoleculargelatinwithAS1.398neutralprotease,bromelainandtheircombinationswasstudiedbyestimatingthemolecularweightsoftheirhydrolyticproducts.Itwasdiscoveredthattheproductshydrolyzedbyusingcombinationenzymeshadlowermolecularweightthanthoseobtainedbyusingsingleones,andthekindofenzymes,theircombinationmodeandadditionsequenceareeffectivewaystocontrolthemolecularweightsofgelatinhydrolyzates.

简介：

简介：

简介：Polydimethylsiloxane(PDMS)rubberlatexwithtwosortsofsensitizers,trimethylolpropanetri-methacrylate(TMPTMA)anddiethyleneglycoldi-acrylate(DEGDA),wasirradiatedwithγ-raysandelectronbeamsinvariousconditions.TheradiationcrosslinkingreactionofPDMSoccursintheinnerphaseofthelatexandisrelativelyisolatedfromthewaterphase.Thereforetheoxygenandtheradicalsproducedbytheradiolysisreactionofwateralmosthavenoeffectonthecrosslinkingreactionofpolymer.TheexperimentaldatacorrespondwiththeCharlesby-Pinnerrelationshipinthemain.Thegelationdoses,degreeofcrosslinkinganddegradationaswellasGvaluesofcrosslinkingwerecalculated.Fromthem,thesensitizationcoefficientswerederivedtoofferaquantitativemeasurementoftheenhancingeffectofsensitizerontheradiationcrosslinking.

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

简介：ThepolymerizationofMMAinitiatedbycopper(Ⅱ）chelatingresins/CCl4systemwasstudied.Fromthekineticdata,thekineticequationofpolymerizationcanbeexpressedasRp=Ke^-56400/RT[MMA]^1.57[CCl4]^m[RESIN-Cu]^0.18wherem:3-4.5,when[CCl4]0.1-6.93M.Thefreeradicalpolymerizationmechanismisproposed.Theprimaryradicalsareformedbytheprocessofcomplexation-chlorinetransformationamongthecopper(Ⅱ)chelatingresin,CCl4andmethacrylate.

简介：

简介：

简介：D－riboseisaunique,5-carbonsugarthatoccursnaturallyinalllivingcells,D-ribosehasbeenusedasastaringmaterialforpreparationofsomecertainmedicinesorjustasanewnutraceuticalthathelpstheodynaturallyrestoreitsenergylevel,Thefermentativeprocessesarethebestfortheirrelativelysimpleseriesofproductionstepsandrelativelycheapstartingmaterials.However,becauseofthemanyimpuritiesinglucoseyeastwateranditsdarkcolor,pretreatmentandpurificationmustbedonetothefluidbeforeD-ribosecanbeseparated.Inthispaper,separationandpurificationofD-ribosewascarriedoutusingcationexchangeresins,ofwhichCa^2+exchangeresinhadthebesteffect.Theoptimalconditionforadsorptionisaflowvelocityof0.5BV/hatadsorptiontemperatureof25℃,Theoptimalconditionfordesorptionisaflowvelocityof0.5BV/hatdesorptiontemperatureof80℃。

简介：Polyamide-1010sampleswereirradiatedinvacuumatroomtemperaturebyCobalt-60γ-rays.Thefreeradicalsformedinirradiationwerestudiedbymeansofelectronspinresonance（ESR）techniques.TheESRspectraconsistedofaquartetandasuperimposedsingletwhichwereattributedtoradical-CO-NH-CH-CH2and-CH2-C=O,respectively.TheeffectsoftemperatureandcrystaUinityontheradicalswerediscussedandthemechanismfortheproductionanddecayoftheradicalswasalsoproposed.

简介：Thetreatmentoftheindustrialwastewater,inwhichtheconcentrationoftriethylamine(TEN)andCODcrwasaround3450mg/Land22400mg/Lrespectively,wasstudiedbyadsorptionofmacroporousresins,ResultsdemonstratethatthepolymericadsorbentCHA-111hasexcellenteffectontheadsorptionanddesorptionofTEN.TheconcentrationofTENintheeffluentislessthan30mg/L,andtheremovalefficiencyofTENandtotalCODcrexceed99%and95%respectively.TheaccumulationandresourcereuseofTENcanberealizedinthisprocess.

简介：FifteennewpolyesterligandswerepreparedbycopolymerizationofEDTA(ethylenediaminetertraaceticacid)dianhydrideorDTPA(diethylenetriaminepentaaceticacid)dianhydrideanddihydricalcoholordihydricphenol.Theirparamagneticmetalcomplexeswerealsosynthesized.Allpolyesterligandsandmetalcomplexeswerecharacterizedby^1HNMR,IRspectraandelementalanalyses.Preliminarystudyshowedthatthepolyestermetalcomplexeshadhigherrelaxationeffectivenessascomparedtocorrespondingsmallmolecularmetalcomplexes.

简介：TheK2Ti4O9whiskerswerechosenforthecatalystcarrier,TiO2/potassiumtitanatephotocatalystwaspreparedbySol-gelmethod.TheproductwascharacteratedbyX-raydiffractionandSEM.EDSshowsthat,themainpeckincludedTi,O,andKinpotassiumtitanatewhisker.ThemainpeakofKdisappearedandthepeaksofTi,Ostayedafterwhiskerwascovered.ItdirectedthatthesurfaceofsamplewascoveredbyTiO2.XRDshowsthatdiffractionpeakappeared,whichwascorrespondedtothepeakofanataseTiO2.Inthereactiondeviceofphotochemistry,usingmiddle-pressuremercurylampasillumination,rhodamineBassimulantpollutant,thephotocatalyticperformanceofTiO2/potassiumtitanatewasstudied.Underthesameconditions,thelowerpH,thelargerilluminance,thehighertemperature,thegreateraerationquantumandthelowerinitialconcentrationofrhodamineB,thehigherdecolorationratewasgot.Underourexperimentconditions:pH6,theilluminanceof250W,thetemperatureof313K,andtheaerationquantumof2.0L/min.WhentheconcentrationofrhodamineBwas8mg/LThephotocatalystofTiO2/potassiumtitanatewas0.01g/L.ThedecolorationrateofTiO2/potassiumtitanatedealtwiththerhodamineBreachover95%in160min,andcomparewithTiO2,thedecolorationrateofrhodamineBwasimproved0.50~1.91multiple.TiO2/potassiumtitanatecanbeusedtotreatmentofdyewastewater.

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：

简介：Inthispaper,effectsonofsixtypeofresinsthedecolorizationofD-ribosezymoticfluidhavebeenstudiedforthefirsttime.TheresultsshowthatresinNKA-IIhasthebesteffect.thedecolorizationrageofD-ribosezymoticfluidis91%atvelocityof1.0BV/hrand25℃,theadsorptioncapacitycanreachupto5.7BV.Theeffectsofadsorptionconditionsaswellasconditionsofresinregenerationontheresindecolorizationcapabilitywerealsostudied.

简介：Theresearchworkonpreparationprocessofactivematerialsoftherareearthionselectiveelectrodesandthevalenceoftheelectrodemembranewerereported.Theactivematerialswerechacterizedbyinfraredspectrum,elementalanalysisandXPS.Wehadstudiedtherareearthionselectiveelectrodesinwhichtheactivematerialsconsistoffunctionalpolymers.Inthispaper,theresearchworkonpreparationprocessandthevalenceoftheelectrodemembranewerereported,whichhasnotbeenseeninliteratureyet.

简介：Discussionispresentedontheuseofthephotoisomerizationofazobenzenechromophoreinthedesignandpreparationofnovelfunctionalmaterials.Thetwosystemsreviewedareazobenzenepolymer-stabilizedliquidcrystalsandazobenzeneelastomers.Inthefirstcase,apolymernetworkcontainingazobenzenemoietiesisusedtoopticallyinduceandstabilizealong-rangeliquidcrystalorientationwithouttheneedoftreatingthesurfacesofthesubstrates.Thisopticalandrubbing-freeapproachwasappliedtonematicandferroelectricliquidcrystals.Inthesecondcase,anazobenzeneside-chainliquidcrystallinepolymerisgraftedontoastyrene-butadiene-styrenetriblockcopolymertoyieldaphotoactivethermoplasticelastomer.Coupledmechanicalandopticaleffectsmakepossibletheformationofdiffractiongratingsthatmaybeusefulformechanicallytunableopticaldevices.