苯乙烯-馬來(lái)酸酐共聚物

styrene-maleic

anhydridecopolymers姓名Content

IntroducedofMonomer

SynthesisoftheSMAPerformanceoftheSMA

ApplicationoftheSMAIntroducedofMonomer

Styrene-maleicanhydridecopolymerswasproducedbythesynthesisof

Styrene

andmaleic,thenletmeshowyouthemonomerfirst.TheIntroducedofStyreneTheIntroducedofmaleicStyreneIntroductionChemicalEnglishnamePhysicalpropertiesChemicalpropertiesStyrene

isakindofaromatichydrocarbons.TheolecularformulaisC8H8。SimplestructuretypeisC6H5CH=CH2.It’sexistintheStyrax(akindofnaturalspices).ChemicalformulaScalemodelStyreneIntroductionItisacolorless,oilyliquidwithspecialfragrance.Themeltingpointis-30.6℃,boilingpointis145.2℃,relativedensityis0.9060(20/4℃),therefractiveindexis1.5469,viscosityis0.762CPatand68℉.Itisinsolubleinwater(<1%),butcansolubleinethanol,etherandotherorganicsolventsmiscible.

phenylethylene，Ethenylbenzene，Styrol，Vinylbenzene，Cinnamene，Styrolene，Cinnamol

StyrenePhysicalpropertiesChemicalEnglishnameStyrenepolymerizationatroomtemperaturecanbeslow。Itcanagenthydroquinoneortertbutylcatecholpoly(0.0002%~0.002%)andresistanceasastabilizertodelaythepolymerization.Styrenedimerformationofpolystyreneresin,itcanalsowithotherunsaturatedcompoundscopolymerization,generationofsyntheticrubberandresinandotherproducts.Forexample,styrenebutadienerubberisacopolymerofbutadieneandstyrene;rawmaterialofionexchangeresinofstyreneanda1,4-two(vinyl)benzenecopolymer.Reactionofstyrenecanalsooccurintheuniqueandolefin.StyreneChemicalpropertiesMaleicanhydrideIntroductionTheproductionmethodThereactioncanoccurMaleicanhydrideMaleicanhydride(MA),referredtoasthemaleicanhydride,It’stheanhydrideofmaleicacid.Whenit’sattheroomtemperatureisacidcolorlessorwhitesolid.ItsmolecularformulaisC4H2O3.ChemicalformulaScalemodelIntroductionHydrolysisofmaleicacid(cis-HO2CCH=CHCO2H),1:1alcoholysisgeneratesmonoester；Dearcis-HO2CCH=CHCO2CH3,usedasadienophileDielsAlderreaction;Lowmetalligand,complexexamplessuchasPt(PPh3)2(MA)andFe(CO)4(MA).Maleicanhydridewasproducedbycatalyticoxidationofbenzenetoprepare,butduetothepricereason,nowmostlyusedinn-butaneoxidationmethod:2CH3CH2CH2CH3+7O22C2H2(CO)2O+8H2MaleicanhydrideThereactioncanoccurTheproductionmethodSynthesisoftheSMAIntroductionHistoryofpreparationReactionprocessReactionmechanismSynthesismethodMaterialsExperimentalprocess

IntroductionofSynthesisMechanismofSynthesisSynthesisprocessIntroductionofSynthesisSMAisanimportantreactivethermoplasticpolymerofferinghighheatresistancewhilemaintaininggoodimpact,rigidityanddimensionalstability.

SMAaccordingtothestructurecanbedividedintotwocategories:alternatetypeandrandomtype.AlternateSMAforstyreneandmaleicanhydridemolarratiotwopolymer;IntroductionStyrenemaleicanhydridecopolymerwassynthesized

in1945byAlfeyandLavinthefirsttime.Theirtwousedbenzoylperoxide(BP0)asinitiator,withbenzeneasthesolvent,in70~80℃forpoly,thengetthestyrene/maleicanhydridecopolymer.Studyonthepolymerizationofstyreneandmaleicanhydridehascausedbyfreeradicalsisreceivingmoreandmoreattention.IntroductionofSynthesisHistoryofpreparation

ThereactionprocessMechanismofSynthesisMaleicanhydridewithsuctionchargecharacteristicsofstrongthatcanchargetransfercomplexationreactionandmolecularformanyrichelectrical.Butthiseffectisrelativelyweak,andeasilyaffectedbyexternalconditions;Thattherearetwopossiblemechanisminthepolymerizationprocess:freemonomermechanism:growthtransitionstatechargetransferbetweenthechainradicalsandmonomers;

growthmechanism

:twokindsofchargetransfercomplexesformedbetweenmonomers,thencomplexinitiationthereactionmechanism.Reactionmechanismchargetransfertypebetweenmaleicanhydridefreeradicalandstyrenemonomerchargetransfertypebetweenstyrenefreeradicalandmaleicanhydridemonomer(1)freeradicalmechanism(2)complexmechanismThemainmethodsofpreparingSMApolymeratpresentareSolutionpolymerizationprecipitationpolymerization,bulkpolymerization,suspensionpolymerization.Comparedwithothermethodofpolymerization,polymerizationforpreparationofpolymercanbedirectlyisolatedfromthesolventprecipitation.AnditspostprocessingisverysimpleMechanismofSynthesisSynthesismethodStyrenewaspurifiedbywashingwith5wt%NaOHaq.Solutiontwiceandthenwithdistilledwateruntilneutralization,followedbydistillationatreducedpressure.Maleicanhydride(MAh)wasmilledintopowderanddriedat50Cinavacuumovenfor10h.Thenitwasstoredinadesiccatorpriortouse.Initiators2,20-azobisisobutyronitrile(AIBN)andbenzoylperoxide(BPO)wererecrystallizedbeforeuse.Acetone,N,N-dimethylformamide(DMF),andcrosslinkingagentdiethyleneglycol(DEG)wereusedasreceived.SynthesisprocessMaterialsInatypicalprocedure,toathree-neckedroundbottlewith10.8gofstyrene,50mlofbutanonecontaining4.9gofMAhand9.7103gofBPOwasaddeddropwise；Thereactionwasroceededat95℃for2hunderthepurgeofnitrogengas；SMAwasthenobtainedbyprecipitatingandwashingwithmethanol；Theprecipitatewasdriedat50℃inavacuumovenfor10h；TherandomSMASynthesisprocessTheexperimentalprocessMAh(4.9g)wasaddedtoathree-neckedroundbottlecontaining100mloftoluene.MAhwascompletelydissolvedafterthemixturewasstirredat75Cfor30min.Amixedsolutionofstyrene:AIBN:toluene(5.4g:2.46103g:20ml)wasthenaddeddropwise.Thepolymerizationwasroceededat75Cfor30min,andat85Cforanother30min.Whiteprecipitatewasobservedwiththeprogressofolymerizationreaction.ThewholecourseofthisreactionwasperformedunderN2atmosphere.TheSMAproductwascollectedbyfiltrationandwashedthoroughlywithtoluene.SMAwasdriedat50Cinavacuumovenfor10h.PreparationofalternatingSMAcopolymerSynthesisprocessSynthesisprocessThedeviceofthereactionPerformanceoftheSMA

Styrene–maleicanhydridecopolymer(SMA)isawellknowncommercializedpolymerwithdiverseapplications.MostofSMAcopolymerscontaininglessthan25mol%ofmaleicanhydridehavebeenusedasadditivestoupgradevariouspropertiesofthestyrenicpolymericmaterials.SMAcopolymerswitharelativelyhighanhydridecontenthavebeenusedforvariouscoatingsadditivesandbinderapplications.CharacteristicsofstyrenemaleicanhydridecopolymerPerformanceoftheSMA

Becauseofthepresenceofaromaticandanhydridefunctionalities,themolecularandsegmentalstructuresofSMAcanbemodifiedeasily.Onecanmodifyitsdegreeofhydrophilicityandotherpropertiesbyadjustingthestyrene–maleicratioorincorporatinglonghydrophobicalkylchainsorhydrophilicoxyalkylenemoieties.

Ithasalotofgoodperformancesonmanyaspectsuchassurfaceactivity,watersoluble,emulsiondispersion,thickening,flocculationandsoon.CharacteristicsofstyrenemaleicanhydridecopolymerRandomstyrenemaleicanhydridecopolymerresinisthedevelopmentofnewheat-resistantplasticvarietiesofsuccessintwentiethCentury70.Itisoneofthespecialresinofstyreneseries,andhasgoodheatresistance,lowmeltviscosity,goodprocessability.Anditisabletocommunicatewithavarietyofpolymerblendingmodification,andhasahighchemicalstability,hardness,transparency,goodfoamingperformance,goodcoloring,electroplating,adhesion.PerformanceoftheSMA

RandomstyrenemaleicanhydridecopolymerApplicationoftheSMALowmolecularweightalternatingSMA

ExamplesofapplicationApplicationofrandomSMARandomstyrenemaleicanhydridecopolymercanbeusdedtobethebuildingmaterials,automotiveinteriorparts,exteriorparts,instrumentpanels,mechanicalhousings,electronicparts,packagingmaterialsandotheraspectsoftheuseofgrowing.Itsexcellentperformanceandoutstandingmolecularpolaritysoasplasticalloycomponentandpolymercompatibilizerhasstrongcompetitiveabilityinfineandspecialpol