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时间:2020-03-26
《导热PE-LD复合材料的制备与性能研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷,第11期工程塑料应用Vo1.42,No.11111Nov2Ol4¨/2014年11月ENGINEERINGPLASTICSAPPLICATIONdoi:lO.3969/j.issn.1001-3539.2014.11.025导热PE.LD复合材料的制备与性能研究周健,陈志健,周仕龙,王国军(江苏理工学院材料工程学院,江苏常州213001)摘要:采用低密度聚乙烯(PE.LD)为基体材料,石墨、A1N为导热填充材料,通过双辊混炼、模压制备了导热复合材料,并对该复合材料的导热性能、力学性能、热行为进行了分析。结果
2、表明,随着石墨或AlN含量的增加,PE—LD/石墨复合材料和PE.LD/AlN复合材料的热导率逐渐增大;PE.LD/石墨复合材料的热导率高于PE.LD/A1N复合材料的热导率。当石墨与AlN的总质量分数为50%、石墨与AlN的质量比为4:1时,PE—LD/石墨/AlN复合材料的拉伸强度、弯曲强度均达到最大值,分别为l2.8,17。15MPa;此时PE—LD/石墨/AlN复合材料的热导率达到最大值,为O.618W/(m·K),略低于添加质量分数50%的石墨时的PE.LD/石墨复合材料的热导率[0.634W/(m·K)]
3、;"3-石墨与A1N质量比为1:4时,PE.LD/石墨/A1N复合材料的热导率为0.488W/(m·K1,高于只添加质量分数50%A1N的PE.LD/A1N复合材料的热导率[0.410w/(m·K)]。当石墨和AIN总质量分数为50%时,随着A1N含量的增加,PE.LD的结晶度增大。关键词:低密度聚乙烯;石墨;氮化铝;热导率中图分类号:TQ327.5文献标识码:A文章编号:1001.3539(2014)11.0117.05StudyonPreparationandPerformanceofLowDensityPoly
4、ethyleneThermalConductiveCompositesZhouJian,ChenZhijian,ZhouShilong,WangGuojun(SchoolofMaterialEngineering,JiangsuUniversityofTechnology,Changzhou213001,China)Abstract:Lowdensitypolyethylene(PE—LD)usedasmatrixmaterial,whilegraphiteandaluminumnitride(A1N)astherm
5、alconductiveparticles,threekindsofcompositeswerepreparedbydoublerollmixingandmoulding.Thermalconductivities,mechanicalperformancesandthermalbehaviorswereanalysed.TheexperimentalresultsdemonstratethatthermalconductivitiesofPE—LD/graphitecompositesandPE-LD/AlNcom
6、positesincreasegraduallywiththeincreaseofthesingleparticlesuchasgraphiteorA1Ncontent.ThegraphiteparticlesaremorebeneficialtoimprovethethermalconductivitythanA1Nparticles.WhenthemassfractionofgraphiteandA1Nis50%andthemassratioofgraphiteandA1Nis4:1,thetensiles~en
7、gth,flexurals~engthandthermalconductivityreachthemaximumvalue,are12.8MPa,17.15MPaand0.618W/(m‘K1respectively,andthermalconductivityofPE—LD/graphite/A1NcompositeisslightlylowerthanthatofPE—LDlgraphitecompositewhichisadded50%massfractionofgraphite.Themassratioofg
8、raphiteandAlNis1:4.thethermalconductivityofPE—LD/graphite/A1NcompositeishigherthanthatofPE—LD/AlNcompositewhichisadded50%massfractionofAlN.Differentialscanningcalorimetryana
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