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PMMA单板及平行双板水平火蔓延特性研究 Title:ExperimentalStudyontheHorizontalFlameSpreadCharacteristicsofPMMASingleandParallelDoublePanels Abstract: TheaimofthisstudyistoinvestigatethehorizontalflamespreadcharacteristicsofPMMA(polymethylmethacrylate)singleandparalleldoublepanels.TheresearchisimportantforunderstandingandmitigatingfirehazardsassociatedwithPMMAmaterialscommonlyusedinvariousindustries.Thestudyinvolvedconductingexperimentalteststomeasuretheflamespreadrate,heatreleaserate,andflamespreadparametersofPMMApanelsunderdifferentconditions.TheresultsobtainedprovidevaluableinsightsintothefirebehaviorofPMMApanelsandcanbeusedtoenhancefiresafetyregulationsanddesignstrategies. Keywords:PMMA,flamespread,horizontal,firebehavior,firesafetyregulations,design 1.Introduction 1.1Background Polymethylmethacrylate(PMMA),alsoknownasacrylic,iswidelyusedinvariousapplications,suchasautomotiveparts,opticaldevices,andconstructionmaterials.However,PMMAishighlyflammable,anditsfirecharacteristicsneedtobethoroughlyinvestigatedtoensureadequatesafetymeasuresareinplace. 1.2Objective ThisstudyaimstoinvestigatethehorizontalflamespreadcharacteristicsofPMMAsingleandparalleldoublepanels.BybetterunderstandingthefirebehaviorofPMMA,itbecomespossibletodevelopeffectivefiresafetystrategiesandregulations. 2.ExperimentalSetup 2.1SamplePreparation PMMAsinglepanelsofdimensions300mm×300mm×3mmwerefabricatedfortheexperiments.Theparalleldoublepanelsconsistedoftwosinglepanelsspaced15mmapart.Thepanelsurfaceswerepreparedtoensureuniformityandcleanliness. 2.2FlameSpreadApparatus Ahorizontalflamespreadapparatuswassetuptomeasuretheflamespreadrate,heatreleaserate,andotherparameters.Itconsistedofaburnerassembly,specimenholders,andadataacquisitionsystem.Theburnerhadadjustablefuelflowratesandaignitionmechanism. 3.ExperimentalProcedure 3.1FlameSpreadTests ThePMMApanelswereexposedtotheignitedburnerflameatoneend.Theflamespreadrateandflamespreadparameterswererecordedatvarioustimesduringthetest. 3.2HeatReleaseRateTests Theheatreleaserateofth