苯乙烯系增韌樹脂本體原位制備技術(shù)的研究

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