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Microwave-assisted polymerization of higher alkylene
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2024-09-29 14:51 630阅读次数
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Microwave-assisted polymerization of higher alkylene
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Microwave-assisted polymerization of higher alkylene- Microwave-assisted polymerization of higher alkylene[详细]
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2024-09-29 14:51
标准
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- Microwave-assisted polymerization of higher alkylene
- Microwave-assisted polymerization of higher alkylene[详细]
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2024-09-24 02:25
专利
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- Accelerating the Living Polymerization of
- Accelerating the Living Polymerization of[详细]
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2024-09-29 08:57
安装说明
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- Microwave-Assisted Polymer Synthesis
- Microwave-Assisted Polymer Synthesis[详细]
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2006-04-30 00:00
应用文章
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- Microwave-assisted synthesis of allylic
- hehydrozirconationofalkyneswithzirconocenehydrochlorideandthedimethylzinc-mediatedadditionofalkenylzirconocenestodiphenylphosphinoyliminescanbegreatlyacceleratedwithmicrowaveirradiation,resultinginaconvenientandrapidone-potprocessforthepreparationofsyntheticallyusefulallylicamines.[详细]
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2018-08-17 10:00
产品样册
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- Microwave-Assisted Stepwise synthesis
- Microwave-Assisted Stepwise synthesis[详细]
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2024-09-29 14:37
实验操作
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- Microwave-assisted rapid and straightforward synthes
- Microwave-assisted rapid and straightforward synthes[详细]
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2015-02-27 00:00
课件
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- Microwave-assisted expeditious and efficient synthes
- Microwave-assisted expeditious and efficient synthes[详细]
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2015-02-09 00:00
应用文章
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- Microwave-assisted sequential one-pot protocol to be
- Microwave-assisted sequential one-pot protocol to be[详细]
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2024-09-27 23:53
专利
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- Microwave-assisted synthesis of allylic amines:
- Microwave-assisted synthesis of allylic amines:[详细]
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2024-09-28 21:29
操作手册
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- Microwave-assisted expeditious and efficient synthes
- Microwave-assisted expeditious and efficient synthes[详细]
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2024-09-23 23:28
操作手册
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- Microwave-assisted arylation of rac-(E)-3-acetoxy-1,
- Microwave-assisted arylation of rac-(E)-3-acetoxy-1,[详细]
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2015-02-27 00:00
课件
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- Microwave-assisted arylation of rac-(E)-3-acetoxy-1,
- Microwave-assisted arylation of rac-(E)-3-acetoxy-1,[详细]
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2015-02-09 00:00
操作手册
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- Microwave-Assisted Synthesis of 3,1,2- and 2,1,8-Re(
- Microwave-Assisted Synthesis of 3,1,2- and 2,1,8-Re([详细]
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2024-09-23 23:30
期刊论文
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- Higher Resolution LCMS and MSMS Analysis of Lipid Ex
- Higher Resolution LCMS and MSMS Analysis of Lipid Ex[详细]
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2024-09-15 21:33
应用文章
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- Recent Advances in Automatic Continuous Online Monitoring of Polymerization Reactions (ACOMP)
- ACOMPallowscomprehensive,model-independent,nearrealtimemonitoringofmanydifferenttypesofpolymerizationreactions.Itprovidesconversionkinetics,andtheevolutionofaveragemolarmass,intrinsicviscosityandaveragecompositiondistributions(forcopolymers).Here,recentadvancesinACOMPwillbesummarized,dea领withcontinuousreactors,copolymerization,‘living’typereactions(NMP,RAFT,ATRP,ROMP),polyelectrolytes,heterogeneousphasereactions,includingfreeradicalreactionsinemulsions,andpredictivecontrol.Inthecaseofemulsionpolymerization,anewapproachwillbepresentedinwhichtheevolutionofthecharacteristicsofboththesolublephasemonomerconversion,polymermolarmassandintrinsicviscosity-andthedispersedphaseparticlesizearesimultaneouslymonitored.NSFCBET0623531,BoRITRS019B,NASANCC3-946,TIMES,PolyRMC(TulaneCenterforPolymerReactionMonitoringandCharacterization).[详细]
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2018-08-31 10:11
产品样册
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- Online Monitoring of the Final, Divergent Growth Phase in the Step-Growth Polymerization of Polyamin
- Usingautomatic,continuousonlinemonitoringofpolymerizationreactions(ACOMP)thefinal,divergentgrowthphase(FDGP)ofthecondensationpolymerizationofdimethylamine,epichlorohydrin,andethylenediaminewasmonitored,whichproducedahighlyramified,polyelectrolyticpolyamine.Theweightaveragemass,Mw,increasedexponentiallyduringtheFDGP,whereasweightaveragedintrinsicviscosity[è]wincreasedslowly,reachingaplateau.Multi-detectorgelpermeationchromatography(GPC)revealedthatpolymersofmass20000to106arebranchedandself-similar,butabovethismass,[è]increaseslessstronglywithM.Thisappearstobeduetohigherorderramification,aprecursortogelation.TheACOMPtrendsinMwand[è]wprovidedirectonlineevidenceofthisprocess.Itisshowncomputationallythatamereincreaseinpolydispersitycannotexplainthisbehavior.GPCshowedthemassdistributionbecomeshighlyasymmetricasconversionincreases.Aplausiblekineticmodelforthedistributionasymmetryisintroduced,andacomplementarymodelfortheeffectsofhigherorderramificationon[è]w.[详细]
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2018-08-31 10:11
产品样册
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- Interfacial polymerization of thin film nanocomposites: A new concept for reverse osmosis membranes
- 作者：AlbertoTiraferria,KaiLoonChenb,RajandreaSethia,MenachemElimelechb （aDITAGDipartimentodiIngegneriadelTerritorio,dell’AmbienteedelleGeotecnologie,PolitecnicodiTorino,CorsoDucadegliAbruzzi,24,10129,Torino,Italy bDepartmentofChemicalEngineering,EnvironmentalEngineeringProgram,YaleUniversity,NewHaven,CT06520-8286,USA） 摘要：Injectionofnanoscalezero-valentiron（NZVI）ispotentiallyapromisingtechnologyforremediationofcontaminatedgroundwaters.However,theefficiencyofthisprocessissignificantlyhinderedbytherapidaggregationoftheironnanoparticles.Theaimofthisstudywastoenhancethecolloidalstabilityofthenanoparticlesthroughtheadditionofthe“green”polymerguargum.Weevaluatedthepropertiesofguargumanditsinfluenceonthesurfaceproperties,particlesize,aggregation,andsedimentationofironnanoparticles.Commercialironnanoparticlesweredispersedinguargumsolutions,andtheiraggregationandsedimentationbehaviorswerecomparedtothoseofbareironnanoparticlesandcommercialnanoparticlesmodifiedwithabiodegradablepolymer（polyaspartate）.Highperformancesizeexclusionchromatography,chargetitration,andviscosityassessmentshowedthatguargumisahighmolecularweightpolymerwhichisnearlyneutrallycharged,renderingitsuitableforstericstabilizationoftheironnanoparticles.Electrophoreticmobilitymeasurementsdemonstratedtheabilityofguargumtoadsorbonthenanoparticles,formingaslightlynegativelychargedlayer.Dynamiclightscatteringexperimentswereconductedtoestimatetheparticlesizeofthedifferentnanoparticlesuspensionsandtodeterminetheaggregationbehavioratdifferentionicstrengths.Guargumeffectivelyreducedthehydrodynamicradiusofthebarenanoparticlesfrom500nmtolessthan200nmandpreventedaggregationofthenanoparticlesevenatveryhighsaltconcentrations（0.5MNaCland3mMCaCl2）.Sedimentationprofilesofthedifferentnanoparticlesuspensionsconfirmedtheimprovedstabilityoftheironnanoparticlesinthepresenceofguargum.Theresultsstronglysuggestthatguargumcanbeusedtoeffectivelydeliverstabilizedzero-valentironnanoparticlesforremediationofcontaminatedgroundwateraquifers. 关键词：Zero-valentironnanoparticles;Guargum;Greenpolymers;Aggregation;Stericstabilization;Groundwaterremediation;DLS;Particlesize[详细]
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2018-08-31 10:11
产品样册
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- Interfacial polymerization of thin film nanocomposites：A new concept for reverse osmosis membranes
- Interfacial polymerization of thin film nanocomposites：A new concept for reverse osmosis membranes[详细]
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2024-09-13 03:21
操作手册
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- Coup领 of near infrared spectroscopy to automatic continuous online monitoring of polymerization r
- Insitunearinfrared(NIR)spectroscopyisperformedsimultaneouslywithautomaticcontinuousonlinemonitoringofpolymerizationreactions(ACOMP)duringmethylmethacrylatepolymerization.ACOMPisanabsolutetechniquethatfurnishesweightaveragemolecularmassMw,intrinsicviscosity,monomerconversion,andothercharacteristics,whereasNIRfurnishesmonomerconversiondataviaanempiricalcalibration.AnadvantageofinsituNIRisthatitfurnishesimmediateinformationontheconversioninthereactor,whereasACOMPreliesoncontinuouswithdrawalanddilutionofasmallstreamofreactorfluid,sothatthereisalagtimeofseveralminutesbetweenwhatACOMPreportsandwhatisoccurringinthereactor.SimultaneousmonomerconversiondatafrominsituNIRandACOMP,thelatterderivedfrombothrefractiveindexandUVabsorption,arecomparedandfoundtobeingoodagreement.TheevolutionofconversionkineticsandMwgenerallyconformtothepredictionsoftheQuasi-SteadyStateApproximation.Havingestablishedtheagreementbetweenthemethods,thepathisnowopenforcombiningNIRwithACOMPtocharacterizeincreasinglycomplexsystems,suchascopolymerizationwithtwoormoremonomericspecies,thatarenotfeasiblebyeithertechniqueseparately.[详细]
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2018-08-31 10:11
产品样册
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