分散聚合制备单分散阳离子型聚苯乙烯微球

3412007JOURNALOFBEIJINGUNIVERSITYOFCHEMICALTECHNOLOGYVol.34,No.120073(,100029):(DMC),,,01982178m,01040125,,m(St)/m(MeOH)011m(DMC)/m(St)0102m(AIBN)/m(St)0102,(0104),2178m:;;;:TB48413:2006204226:(50433040);(XK100100433/XK100100540):,1980,3E2mail:[e-mail][125],,[6],,,,,,,,,,,Goodwin[7],LIU[8],,,,,,,,[9](DMC),,,,1111(St),,,,;(AIBN),,;(DMC),,,75%;(MeOH),,,112MeOHStDMCAIBN250mL,;,70,AIBN;89h,,(DMC)11311311,2mL,,(1)(C)C=m1m02V0100%(1),m0,m12mL,V011312,(SEM,CAMBRIDGE),d()IP,(2)(4):d=ni=1di/n(2)=(di-d)2n-11/2(3)IP=d(4)2m(St)/m(MeOH)=011,m(DMC)/m(St)=0102,m(AIBN)/m(St)=0102,T=70,200r/min12Fig.1Relationshipbetweenthestyreneconversionandpolymerizationtime211StDMCMeOH,7030min,,,1,,3h,20%,;20%,;8h,,70%,,,,,,,,,,,,,,21221211DMC,,,,,,2,2%,,,01982178m(1),,,,,(2%),(2d),,,(2ef)DMC,,DMC,,DMC,,,1Table1DiameteranddiameterdistributionofparticlesobtainedatdifferentconcentrationsofDMCm(DMC)/m(St)d/mIP10.00300.980.0520.00801.850.0730.0202.780.0440.02550.03060.050m(St)/m(MeOH)=0110;m(AIBN)/m(St)=01020;042007(2%),DMC,,,,DMC,,DMC2%2SEMFig.2SEMimagesofpolystyreneparticlesobtainedwithdifferentconcentrationsofDMC21212(/),32,,,,,,,;,,,,,,,21213(/)432%3%,,,,2178m1163m,,01040120,,,2Table2Diameteranddiameterdistributionofparticlesobtainedwithdifferentconcentrationsofmonomerm(St)/m(MeOH)d/mIP10.0501.080.1120.151.600.2430.201.790.25m(DMC)/m(St)=0102;m(AIBN)/m(St)=0102;T=70;200r/min,,,,,,4(c),213m,,,,,141:3Fig.3SEMimagesofpolystyreneparticlesobtainedwithdifferentconcentrationofstyrene4SEMFig.4SEMimagesofpolystyreneparticlesobtainedwithdifferentconcentrationsofAIBN3Table3DiameteranddiameterdistributionofparticlesobtainedwithdifferentconcentrationsofAIBNm(AIBN)/m(St)d/mIP10.0202.780.0420.0302.210.1430.0401.630.20m(St)/m(MeOH)=0110;m(DMC)/m(St)=01020;T=70;200r/min3(1)DMC,,,01982178m,01040125(2),,m(St)/m(MeOH)=10%,m(DMC)/m(St)=2%,m(AIBN)/m(St)=2%,(3)DMC,,,,:[1]KAWAGUCHIH.Functionalpolymermicrospheres[J].ProgPolymSci,2000,25:1171-1210.[2],,.[M].:,2002:304-310,474-477.[3]OHSHIMAH,KONDOT.Approximateanalyticex2pressionfortheelectrophoreticmobilityofasphericalcol2loidalparticle[J].JColloidInterfaceSci,1989,130:281-282.[4]MIRABALLES2MARTINEZI.Synthesisoflatexparti2cleswithsurfaceaminogroups[J].JPolymSci,PartA:PolymChem,2000,38:4230-4237.[5]XUZushun,ZHANGJinzhi,CHENGShiyuan.Studyymerization[J].JournalofFunc2242007tionalPolymers,1995,8(4):512-519.[6]DALESMJ.Crosslinkedgelionexchangeresinbeadscharacterizedbystrainbirefringencepatterns:US,4192921[P].1980-03-11.[7]GOODWINJW,HEARNJ,HOCC,etal.Prepara2tionandcharacterizationofpolymerlatticesformedintheabsenceofsurfaceactiveagents[J].BrPolymJ,1973,5:347-362.[8]LIUZuifang,XIAOHuining,WISEMANN.Emulsifi2er2freeemulsioncopolymerizationofstyrenewithquater2naryammoniumcationicmonomers[J].JApplPolymSci,2000,76:1129-1140.[9]SONGBK,CHOMS.Dispersionpolymerizationofacrylamidewithquaternaryammoniumcationiccomonomerinaqueoussolution[J].JApplPolymSci,2002,87:1101-1108.MonodispersedcationicmicrospheresofpolystyrenepreparedbydispersionpolymerizationWANGZhanLiLIULianYingDENGJianPingMAYuHongYANGWanTai(CollegeofMaterialsScienceandEngineering,BeijingUniversityofChemicalTechnology,Beijing100029,China)Abstract:Cationicmicrospheresofpolystyrenewerepreparedthroughdispersionpolymerizationinmethanolwith[22(methacryloyloxy)ethyl]trimethylammoniumchloride(DMC)aspolymericstabilizerandAIBNasini2tiator.Thepolymerizationbehaviorandeffectsofvaryingtheconcentrationofstabilizer,monomerandinitiatoronparticlesizeandsizedistributionwerestudied.BymeansofSEM,itwasshownthatmonodispersedmicro2spheresofpolystyrenewithparticlesizeintherangeof01982178mcouldbeobtained.Keywords:monodispersed;cationicmicrospheres;polystyrene;dispersionpolymerization(38)Synthesisandcross2linkingoftrimethoxysilaneterminatedpoly(diethyleneglycoladipate)DONGJingBoJIANGShengLingZHAOJingBo(CollegeofMaterialsScienceandEngineering,BeijingUniversityofChemicalTechnology,Beijing100029,China)Abstract:Carboxylterminatedpoly(diethyleneglycoladipate)(PDA)wassynthesizedbythepolycondensationofdiethyleneglycolwithexcessadipicacid.ThemolecularweightofPDAwasfoundtobe3715underoptimizedconditions,wheren(diethyleneglycol)/n(adipicacid)is1andw(SnCl2)is013%.Trimethoxysilane2termi2natedPDA(PDA2Si)wasobtainedthroughreactionofthecarboxylterminatedPDAwith2glycidyl2oxy2propy2ltrimethoxysilane(KH560).Thecross2linkingreactionoftrimethoxysilane2terminatedPDAwasperformedus2ingmoistureintheairwithdibutyltinlaurate(DBTL)(5%)ascatalystat40for5h.Inthisway,amolecu2larornano2scalepolyester/SiO2hybridcanbeobtainedwithoutthepresenceoforganicsolvents,incontrasttotheconventionalmethods.Keywords:poly(diethyleneglycoladipate);trimethoxysilaneterminatedpolyester;polyester341: