膨胀尼龙6_石墨复合材料的制备与导电性能研究

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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