简介:Newmodelcompound1H,1′H-Bis(benz-Δ^4-imidazoline)2,2′-spiro-titaniumdichloridewaspreparedandthestructureofthecompoundwasdeterminedby1R,MSandelementaryanalysis.
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:Fivenewopticallyactivepolyamides(PAs)6a-6ewerepreparedbydirectpolycondensationreactionof2-(1,3-isoindolinedione-2-yl)-glutaricacid4asanewchiraldiacidwithvariousaromaticdiamines5a-5einamediumconsistingoftriphenylphosphite(TPP),calciumchloride,pyridine(Py)andN-methyl-2-pyrrolidone(NMP).Thepolycondensationreactionproducedaseriesofpolyamids6a-6einquantitativeyieldswithinherentviscositiesof0.26-0.39dL/g.Theresultingpolymerswerefullycharacterizedbymeansof~1H-NMR,FT-IRspectroscopy,elementalanalysis,inherentviscosityandspecificrotation.Thermalpropertiesofthesepolymerswereinvestigatedusingthermalgravimetricanalysis(TGA)anddifferentialthermalgravimetry(DTG).PhthalimideringsasabulkypendentgroupinthepolymerchainsdisturbtheinterchainandintrachaininteractionsandmakethesePAsreadilysolubleinpolar,aproticsolventssuchasN,N-dimethylacetamide(DMAc),N,N-dimethylformamide(DMF),dimethylsulfoxide(DMSO),N-methyl-2-pyrrolidone(NMP)andsulfuricacid.
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: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:TheNdCl3/MgCl2bisupportedcatalystwaspreparedbyusingNdCl3,MgCl2,(CH3)2(CH2)2OHandTiCl4.ItisshownthatthestructureofbisupportedcatalystwasdifferentfromthoseofeitherNdCl3orMgCl2singlesupportedcatalyst.Apeculiartypeofkineticcurveforethylenepolymerizationwasfound.
简介:Polyfluoroalkylsubstituted2-hydroxyethylacrylate6wassynthesizedinsixstepsusingglycerolasastartingmaterial.Apreliminaryinvestigationhasbeentakenonthesynthesisandcharacterizationofcopolymersof6and2-hydroxyethylmethacrylate.
简介:六新光学地活跃并且flame-retardant(amide-imide)poly,在主要的链作为一个flame-retardant单位包含磷化氢氧化物一半的s白族5a鈥?f从六chiralN的直接polycondensation反应被综合,有二度(3-aminophenyl)的N鈥?(pyromellitoyl)-bis-L-amino酸3a鈥?f在中等在于的苯基磷化氢氧化物4N-methyl-2-pyrrolidone(NMP),triphenyl亚磷酸盐(TPP),钙氯化物(CaCl2)和pyridine。生产的聚合反应一系列光学地活跃poly(amide-imide)有好产量和0.34鈥?.70dLg的好固有的粘性的s?1。结果的聚合物充分借助于FTIR和1H-NMR光谱学,胶化浸透层析(GPC),元素的分析,固有的粘性和溶解度测试被描绘。热性质和白族5a鈥?f的flame-retardant行为被调查使用热gravimetric分析(TGA和DTG)并且限制氧索引(LOI)。热分析(TGA和DTG)获得的数据表明这些聚合物显示出好热稳定性。而且,在TGA的高字符产量和好LOI值显示产生聚合物能够展出好火焰retardant性质。N,N鈥?(pyromellitoyl)-bis-L-amino酸3a鈥?f被pyromelliticdianhydride(1,2,4,5-benzenetetracarboxylicacid-1,2,4,5-dianhydride)的冷凝作用反应在量的收益准备1与L丙氨酸2a,L缬氨酸2b,L白氨酸2c,L异白氨酸2d,L苯基丙氨酸2e和L-2-aminobutyric在醋酸的酸2f答案。关键词光学地活跃-Flame-retardant聚合物-Poly(amide-imide)s-限制氧索引