苯乙烯系增韌樹脂本體原位制備技術的研究

1、大連理工大學碩士學位論文苯乙烯系增韌樹脂本體原位制備技術的研究姓名：賈忠明申請學位級別：碩士專業(yè)：高分子材料（化工）指導教師：李楊張學全20090701人連理工人學碩十學位論文Studyonthepreparationtechnologyoftoughenedpolystyrenewithinsitubulkpolymerization‘AbstractPolystyrene(PSt)iswidelyusedinmanyengineer

2、ingfieldsduetoitsexcellentmechanicalpropertyandgoodproeessabilityPStisoftenmodifiedwithrubberparticles，leadingtohigh—impactpolystyrene(HIPS)，acrylonitrilebutadienestyrene(ABS)However，inthetraditionalprocessofhighimpactma

3、terials，therubbermaterialsneedtobeisolatedfromthepolymersolutionandrenewedlydissolvedinStThus，muchlaborandexpensiveapparatusarereqmredforevenlydissolvingthembbermaterialinthemonomerAconsiderablereductionofvariableCOstsca

4、nbeachievedbyadoptingtheSOcalled伽心療“bulkpolymerizationprocessinwhichasolutionofbutadienepreplolymerisproducedthroughselectivepolymerizationofbutadiene(Bd)instyrene(St)andthentheresultantprepolymersolutionwasfurthersubjec

5、tedtoacopolymerizationofStandacrylonitrile(AN)initiatedbyradicalinitiatortoproducehighimpactmaterialsdirectlyInthisstudythesolutionpolymerizationof13butadiene(Bd)Wasinvestigatedinstyrene(St)謝mthecatalystsystemcomprisedof

6、Nd(Ps07)3(Nd)，Al(iBu)2H(A1)andEt3A12C13(C1)TheeffectsofsolventcatalystcomponentsandpolymerizationtemperatureonpolymerizationofBdwereexaminedMeanwhile，theeffectsofagingmethodsandthekindsofcocatalystonthemolecularweight(M功

7、andmolecularweightdistribution(Mw／M)ofprepolymerwereinvestigated111eresultsindicatedthattheselectivepolymerizationofBdWasachievedinStbytheabovecatalystThepolymeryieldWasupto90％at500C，Al／Ndmolarratioof10andCI／Ndmolarratio

8、of2TheproducedpolymerhadextremelylowcontentofStcontent(3％)，llighcis1，4contentof90％and12contentof2％RelativenarrowMw／MofpolymerCanbeobtainedwhenthecatalystWasagedinthepresenceofBdButadieneprepolymers、N地LdifferentMwandMw|Mn

9、weresynthesizedusingdifferentA1／NdmolarratiosandagingmethodsAndthenproducedhighimpactmaterialsdirectly(HIPSandABS)Furthermore，theeffectsofrubbercontent，molecularweight(尬力andmolecularweightdistribution(Mw／M)ofprepolymerth

10、eamountsandkindsofinitiatorsonthemicrostructure，kineticsofpolymerizationandtheproprietiesoffinalproductswereinvestigatedItisshownthatasthembbercontentincrease，bothimpactstrengthofHIPSandABSincreased，thetensilestrengthdec

11、reasedgraduallyandtheelongationatbreakincreased碭eimpactstrengthofresintoughedbyprepolymerwithbroadMw／MnwashigherthanthatoftoughedbyprepolymerwithnarrowMw／MAstheamountsofinitiatorincreased，bothGDandRPVFslightlyincreasedTh