资源描述：
《Chemically Induced Phase Separation in the Preparation》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、ChemicallyInducedPhaseSeparationinthePreparationofPorousEpoxyMonolithJIANHUALI,ZHONGJIEDU,HANGQUANLI,CHENZHANGTheKeyLaboratoryofBeijingCityonPreparationandProcessingofNovelPolymerMaterials,BeijingUniversityofChemicalTechnology,No.15,BisanhuanEastRoad,ChaoyangDistrict,Beijing100029,People’sRepubli
2、cofChinaReceived28March2010;revised6June2010;accepted15June2010DOI:10.1002/polb.22095Publishedonline20August2010inWileyOnlineLibrary(wileyonlinelibrary.com).ABSTRACT:Amethodologyforpreparingporousepoxymono-bytheinitialcompositionandillustratedbyapseudophaselithviachemicallyinducedphaseseparationw
3、asproposed.diagram.Theporesizeincreasedwithincreasingtheconcen-Thestartingsystemwasamixtureofanepoxyprecursor,trationofPPCandraisingthecuringtemperature.Theinter-diglycidyletherofbisphenol-A(DGEBA),acuringagent,4,40-mediateandfinalmorphologiesofthesystemwerestudieddiaminodiphenylmethane(DDM),anda
4、thermoplasticpolymer,usingopticalandscanningelectronmicroscopy,respectively.polypropylenecarbonate(PPC).AsDGEBAwascuredwithVC2010WileyPeriodicals,Inc.JPolymSciPartB:PolymPhysDDM,thesystembecamephase-separatedhavingPPC48:2140–2147,2010particlesdispersedinepoxymatrix.AfterPPCparticleswereremovedbyt
5、hermaldegradation,aporousstructurewasKEYWORDS:chemicallyinducedphaseseparation;polypropyl-obtained.Thephaseseparationmechanismwasdeterminedenecarbonate;porousepoxymonolith;thermaldegradationINTRODUCTIONThermosettingpolymershavefoundimpor-thecontinuousanddispersedphase.Ifthecontinuousphasetantappl
6、icationsinthefieldsofaerospaceandelectronicisapolymerizablemonomer,arigidmatrixwillformonindustrybecauseoftheirexcellentthermalanddimensionalpolymerization.Porousstructureisobtainedafterremovalofstabilities,highmodulus,andgoodsolventresistance.Inthedispersedphase,whichismostoftenalow-molecularadd
7、ition,theyhavebeenusedaschromatographyseparationweightliquidsuchaswater.Thethirdtechniqueinvolvesan1mediaandsupportsforflowthroughsystems,forexample,initialphaseseparationfollowedbyasolidificationtofixthe2immobilizedca
