简介：glutamic酸(LG)和丁氨二酸酸(ASP)的随机的共聚物，poly(LG-co-ASP)，能成功地与debenzylation经由N-carboxyanhydride戒指开始copolymerization的联合与设计作文被综合。-benzyl-L-glutamateN-carboxyanhydride(BLG-NCA)和-benzyl-LaspartateN-carboxyanhydride(BLA-NCA)的戒指开始copolymerizations被使用不同的胺包括执行象开始者的triethylamine(茶)，diethylamine，n-hexylamine(NHA)，triphenylamine，二苯胺或苯胺。所有6胺是高度有效的poly变得明确(BLG-co-BLA)共聚物与尽管聚合经由不同机制(正常的胺机制或/并且激活的单体机制)继续了，设计了作文，它基于胺的化学结构。分子的重量(BLG-co-BLA)poly，共聚物能被茶集中和聚合时间调停。然后，debenzylation(BLG-co-BLA)poly，共聚物被进行准备相应吸水的随机的共聚物(LG-co-ASP)poly以ASP结构的单位与子单元组织。LG结构的单位在的内容(LG-co-ASP)poly，共聚物在NCA单体BLG-NCA与那些匹配在NHA或茶开始并且接近了理论线的戒指洞copolymerizations喂。diblock共聚物(BLG-b-BLA)能被BLGNCA和BLA-NCA的顺序的增加也poly经由生活NCA戒指洞copolymerization综合。

简介：Opticallyactive(R)-(+)-2,2’-bis(2-trifluoro-4-aminophenoxy)-1,1’-binaphthylwaspreparedfrom1,1’-bi-2-naphthol.Theopticallyactivearomaticpolyimidewasalsosuccessfullysynthesized.Thisnewpolymerhasgoodsolubility,thermalstabilityetc.Itsspecificrotationwasfoundtobe+174°,anditschiropticalpropertywasalsostudied.

简介：由形成毛孔的代理人聚乙烯乙二醇(木钉)组成的各种各样的贯穿半的聚合物网络(semi-IPN)hydrogels，丙烯酸的酸(AA)和acrylamide(AM)被与一个二拍子的圆舞方法使用免费激进的聚合准备。综合hydrogels的化学结构被FTIR光谱学描绘，形态学被扫描电子显微镜学(SEM)学习方法。胀大的性质例如pH应答的行为，腌敏感，在有各种各样的pH价值的不同答案的摆动的swelling/de-swelling行为和在洗澡pH振荡器的自我震荡的行为详细被调查。当pH从3.0和7.0并且很好中等变化珍视时，结果表明准备hydrogels展出了高pH敏感和优秀的盐敏感由经历很多swelling/de-swelling的可逆性质再循环。特别地，hydrogels在包含兄弟的一个封闭系统展出了自激振荡行为3那么32Fe(CN)64H+。这研究可以为新自我走的致动器和另外的设备作为biomaterial创造新可能性。

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：Newmodelcompound1H,1′H-Bis（benz-Δ^4-imidazoline)2,2′-spiro-titaniumdichloridewaspreparedandthestructureofthecompoundwasdeterminedby1R,MSandelementaryanalysis.

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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：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：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：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.

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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.