1、Y859399學(xué)號(hào)艘籃叢絲Q熊困北京眼襄謦院碩士研究生學(xué)位論文題目：屋蕉!叢鹽金絲筮金盟拙鰉憊監(jiān)：女趁壘監(jiān)魅孟孟寶、英文題目：』I絲每』L吐譬p尹幽【垃虹J婦_擄旺_姓名：筮全虛專業(yè)：趕登鱟導(dǎo)師：煎生壘二00六年三月ABSTRACTNylon6／nanosilicacompositeswerepreparedbytwomethods：meltblendingandin—situring—openingpolymerizationThef

2、ormerwereproducedbytwoscrewextruderfromindustrynylon6slicesandthecontentofnanosilicaincludingsurfacetreatedanduntreatedseparatelywas25wt％；thelatterweresysthesisedbyring—openingpolymerizationwhichusing￡一caprolactamasmonom

3、er，waterasring—openingagent，and6aminocaproicacidascatalyzerThenanosilicawastreatedbysilianecouplingagentKH一550，thenresearchedbyScanningElectronicMicroscope(SEM)，Thermogravimetricanalysis(TG)，F(xiàn)ouriertransforminfraredspect

4、roscopy(FTIR)andsedimentationTheresultsshowedthatthesurfacemodificationofnanosilicabyK／／一550waseffectualThemeasures，suchasSEM，TransmissionElectronMicroscope(TEM)，DifferentialScanningCalorimetry(DSC)，PolarizingOpticalMier

5、oscope(POM)，XRaydiffraction，TQDynamicmechanicsanalysis(DMA)andthemicro—hightemperaturestaticanddynamicstatetestingmachinewereusedforresearchingthestructureandthepropertiesofnylon6／nanosilicacompositesItWaSfoundthatthenan

6、osilicadispersedwellinsidenylon6matrixafterbeingsurface—treatedbyKId550，butwiththeincreaseofnanosilica，someaggregationofnanosilicacameforth；theintroducingofnanosilicaledtogreatercrystalvelocitybutdepressedcrystallinityan

7、dtemperatureofcrystalofnylon6AndthespherocrystalbecamesmallerX—raydiffractionofcompositesthroughlongtermannealingat1704CdemonstratedthatthecrystalformtransformedfromatformtoYformThermostabilityofcompositesproducedbymelti

8、ngblendingimproved，butthermostabilityofcompositessynthesizedbyringopeningpolymerizationhadnoevidentchangesWiththefurtherresearchbyDMA，nylon6／nanosilieacompositesshowedhighstoragemodulus，moreoverthestoragemodulusincreased

9、withtheaugmentationofnanosilica，andglasstransitiontemperatureshiftedtolowerTensilefailuretestsofthecompositeswerecarriedonthemicrohigh—temperaturestaticanddynamicstatetestingmachineTheresultsindicatedthattensilefailureme

10、chanicsofnylon6／nanosilicacompositesareapproximatelyincomfirmitytocrazingmechanicsandcavitationmechanics：nanosilicaexistsinnylon6matrixaSstressconcentrationpointwhichinducedlargeamountofcrazingsandabsorbedagreatdealofene