HPES對PEI改性環(huán)氧樹相分離和力學(xué)性能的影響.pdf

1、復(fù)旦大學(xué)碩士學(xué)位論文HPES對PEI改性環(huán)氧樹相分離和力學(xué)性能的影響姓名：章志成申請學(xué)位級別：碩士專業(yè)：高分子化學(xué)與物理指導(dǎo)教師：李善君崔峻2000.6.1墮塞塑堊——魚叢生墮塑堅(jiān)EffectofPolyethersulfoneonthePhaseSeparationofPolyetherimideModifiedEpoxyResinAbstractHydroxyl—terminatedpolyethersulfone(HPES)isa

2、ddedasasecondtoughenerintopolyetherimide(PEI)modifiedepoxyresinandphaseseparationinitiatedbythecuringreactionofepoxyisstudiedbyscanningelectronicmicroscopy(SEM)，transmissionelectronmicroscopy(TEM)andtimeresolvedlightscat

3、tering(TRLS)SEMshowsthatbyaddingHPESwithahighermolecularweight，phaseinversioncanbeobservedatdifferenttemperaturesandthedispersedparticlesshowabimodalsizedistributionTRLSexperimentrevealsthatthepeakscatteringvectorq。shift

4、stowardssmallerangleortowardslagerangle，dependingonthemolecularweightofHPESaddedTEMexperimentshowsthatintheearlytimeofphaseseparationdissimilarmorphologiesareobservedwhenIJPESofdifferentmolecularweightisaddedrespectively

5、TherheometryandTRLSresultsindicatethatmorphologyispinnedupbythelowmobilityofthetwocomponentsbeforegelationorvitrificationThemechanicalpropertiesofthemodifiedblendsarecharacterizedviafracturemechanicsmeasurementAscocontin

6、uousorphaseinversionmorphologiesareobservedintheblendswhen6phrHPESareaddedtogetherwith14phrPEI，thefractureenergy(Gic)oftheseblendsisclosetothatof20phrPEIloadedblendwhilePEIloadingisloweredDynamicMechanicalAnalysis(DMA)ex

7、perimentsrevealthatwhilethePEIloadingislowered，themodulusloweringonsettemperatureisstillthesameasPEIaloneloadedepoxyresin，indicatingviaaddingHPESintotheblends，thethermalresistanceoftheresultedepoxyresin；sstmaintainedKeyW