简介：PolymerPhysicsLaboratory,InstituteofChemistry,TheChineseAcademyofSciences,Beijing100080,China

简介：Thisresearchstudiedtheinitiatorefficiencyforproducingpolymericparticlesofpoly(styrene-co-methylmethacrylate)copolymersbyaShirasuporousglassmembrane(SPG)emulsificationtechniquefollowedbysuspensioncopolymerization.BPO,ADVN,andAIBNwereusedasinitiatorsandwefoundthatBPOisthemostsuitableinitiator.Copolymersforvariousfeedratiosofstyrene/methylmethacrylatewerethussynthesizedbybenzoylperoxide,andtheircopolymerparticlesize,molecularweightdistributionandparticlesizedistributionwerecharacterized.Thenn-BMAor2-EHMAwasaddedasthethirdmonomertodecreasetheterpolymerglasstransitiontemperature.Thisarticledescribesthepreparationtechnique,recipesandpolymerizationconditionsforproducingbothcopolymerandterpolymerpanicles,particlesizechanges,thecorrespondingparticlemorphologiesandglasstransitiontemperatures.

简介：Theaimofthisstudyistoreportandanalyzethefactorsrelatedwithearlieroccurrenceofsiliconeoil(SO)emulsificationinpatientsunderwentparsplanavitrectomyandSOinjectioninourhospital.WeretrospectivelyreviewedconsecutivecaseseriesundergonebothSOinjectionandremovalinourhospital,and182oneswereeligible.Possiblerelatedindependentfactorsincluded:maculastatus(on/off),concomitantphacoemulsificationwiththesurgeryofSOtamponading,concomitantstatusofproliferativevitreoretinopathy,combinedsurgeryofretinotomy,timetohaveemulsification(<6mo/≥6moafterprimarySOinjection),routeofSOinjection(anterior/posterior),lensstatus(aphakic/pseudophakic/phakic),anesthesia(local/general),brandsandtypeofSO,with/withoutepiscleralcryotherapy,with/withouthypertension,with/withoutdiabetes,with/withoutintraoperativeuseoftriamcinoloneacetonide.ThestudyrevealedthatbrandandtypeofSOwasthesignificantfactorrelatedwithearlieremulsificationofSO.Furtherstudywaswarrantedtofindouttheunderlyingcauses.

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