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ID:36520512
大小:1.54 MB
页数:64页
时间:2019-05-11
《膨胀尼龙6_石墨复合材料的制备与导电性能研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、分类号UDC密级坌五单位代码10094讶孽芒湃茴丈李硕士学位论文膨胀尼龙-6/石墨复合材料的制备与导电性能研究姓名:达慧芳导师姓名:李冀辉教授专业名称:有机化学研究方向:有机合成申请学位级别:理学硕士二oo七年五月AbstractNylon·6isonekindofpioneerengl。neeringplastic.whichhasbeenwidelyappliedtomacMnetool、autocar、mechanism、weave、trafficandchemicalindustry,becauseofitisabletobearoil、fric
2、tion、shakeandchemicalmedicineandhashi【ghstrength、heatstability,etc.However,somedeficiencies,suchaspoorcapacityofanti-acidandanti-base,lowimpactintensity,higldymoistureabsorptionandflammability,limititsbroaderapplication.Soitspropertiesusuallyimprovedbythewayofaltogether-polymeriz
3、ation、blending、filling、molecules-complexandSOon.ExpandedgraphRe饵G)notonlykeepsthefineelectricalconductivityofgraphite,butalsohastheexcellentabilityoflubricating、anti-hightemperature、anti·erosionandSOon.Soithasbeenwidelyappliedtoprepareconductive、wearable、antifrictionandfireproofi
4、ngcomposites.Itcouldmechanicallyblendwithnylon·6asfinefiller,andcouldgetalongwithmonomersasrawmaterialtosynthesiscompositesbyinsitupolymerization,thenthematerialpropertiesoftheresultingcompositesareimprovedrelativetothevirginpolymer.Inthispaperweusethe50meshflakegraphiteasrawmate
5、rialtopreparethegraphiteintercalationcompound(expendablegraphite),whichcouldexpandatlowtemperature.Thesulfur-freeexpandablegraphiteWasusedasexpandingagenttosynthesizetheexpandedPA-6/graphitecompositesforthefirsttime.Theexpandingagentandnylon一6weremixedtoprocessbyin—situpolymeriza
6、tion,usingtheheatenergyeffecttoexpandandimprovethepropertiesofnylon一6,finallygetanowkindoflow—density、porous、conductivecomposite.ⅡThemainworkofthisthesis:1.Using50mesh(320urn)flakegraphiteasrawmaterialstopreparesulfur-freehi曲lyexpandablegraphite,andtheexpandablegraphitecouldexpan
7、datlowtemperature.2.ThestructureofexpandablegraphitehadbeenmeasuredbyUV,SEM,HPLC,IRandXRD9etc.3.Thedifferentexpandednylon-6/graphiteconductivecompositeshavebeensynthesizedusingexpandablegraphiteasexpandedagent,inhightemperatureandcommonpressure·4.Thestructureofexpandednylon一6/gra
8、phitecompositeshadbeenmeasuredbyIR,SEM,X
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