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1、桂林理工大學碩士學位論文有機硅樹脂共混改性酚醛塑料的研究姓名:王建申請學位級別:碩士專業(yè):高分子化學與物理指導教師:呂建20100401桂林理工大學碩士學位論文Abstract111ispaperhasimprovedtheheatresistanceofthebakelitethroughthecuringofsiliconeresininthephenolicresinandtheinterpenetratingnetworkstr

2、uctureThecapacityofblendingsiliconeresinandphenolicresinwasresearchedbymeansofTQHeatDistortionTemperature,DMAandsoOILMeanwhilethemainperformanceofmodifiedbakeliteinheatresistance,mechanicalpropertiestheologyabsorbentande

3、lectricalpropertiesandthecuringsystemweretestedWefoundouttheeffectofthecuringagentcontentonthepropertiesofmodifiedBakeliteanddeterminedthecuringprocessparametersbyDSCAswell笛thephenolicmoldingcompoundwasprocessedbytheheat

4、resistantandreinforcingglassfiberandthemodifiedphenolicresinaccordingtothekeyperformanceindicatorsofcommutatorUltimatelyweusedthemodifiedresininfrictionmaterialsandconcluded叢fellows:(1)theresultsofthermalperformancetest:

5、theheatdistortiontemperatureofPFSI15%plasticreachedto215℃andwasincreasedbynearly20“12Between350℃and385℃theweightlessnessofplasticw豳only2680/0butthepurephenolicresinwas659%TIleresultsofdynamicmechanicaltestshowedthat:thes

6、toragemodulusofplasticwasdecreasedwithaddingsiliconeresinyethasliuleimpactontheliquidityofplasticBesidesthegoodcapacitybetweensiliconeresinandphenolicresinwasseenfrompeakpositionpeakheightpeal【widthofmechanicalloss舔well齬

7、thechangesindynamicmodulusexistingineachcomponentMeanwhilethetestresultsshowedthattheelectricalpropertiesandwaterabsorptionofplasticwereimprovedbutthemechanicalpropertieswe陀weakened(2)wtIlthegrowingcontentofcuringage鵬the

8、glasstransitiontemperatureandheatdistortiontemperatureofcompositionhasraisedwhenthecontentofcuringagentwas10%theglasstransitiontemperatureofcompositionwas224“C;meanwhilethestorage。modulusandtherigidwereenhancedwiththeinc

9、reasingcontentofcuringagentsametotheinitialglasstransitiontemperatureThetendencyoftanSlosspeakmovingtotemperaturerangeprovedtheelevationofTginBakeliteMoreovertheimpactstrengthandbendingstrengthofplastichasboostedtodiffer

10、entdegreesuchasthemaximumvalueofimpactstrengthwas669KJcmzwhentheH舳contentwas12%andthebendingstrengthwas939MPawhen14‰1rI嗆curingprocessparametersofBakelitewith12%curingagentcontentwere:geltemperaturewas145“(2curingtemperat

11、urewas156℃andreprocessingtemperaturewas173℃(3)Theresearchofdifferentcontentofflame—rerardantandglassfiberinplastichasdemonstratedthattheflameretardantleveIofplasticwasuptoFVOwhenthecontentofglassfiberwas50%,t11elinearexp

12、ansioncoefficientwas644kJ/m2whenthecontentofglassfiberreachedthemaximumvalueof60%morethantheaveragevaluefromloomtemperatureto200“12andthebendingstrengthwasuptothemaximumvalueof125MPawhenthecontentofglassfiberwas50%Theinc

13、reaseofglassfibercontenthaslittleeffectonelectricalproperties,waterabsorptionanddensitybutimprovedthedimensionalstability(4)Thefrictioncoe硒cientofmodifiedphenolicfrictionmaterialwasreducedtoalesserextentandincreasedto052

14、28x10“cm3/Nmhigherthan250l℃oftemperatureInadditiontheanalysisofSEMtestifiedthatthefrictionsurfaceofthemodifiedmaterialwasrelativelyflatbutinlcoalwasadhesiveandthefrictionwasstableKeywords:phenolicresin;siliconeresin;blen

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