课件成果讲稿application vapor pressure polyol foam plastics

TestingVaporPressureofPolyolandBlowingAgentspurposes.Inapre-stageofproducingfoamstic,specialpolyolblendsaremixedwithsmallertiesofablowingagent,usuallypentane,tocreatesoftorsolidfoam. ics.Oncemixedwiththeisocyanate,thepolyol/blowingagentmixturescaneasilyexpandto35timesthevolumetheysamplesareviscousandstickyandsecondlythe measurements.Alsothetendencyofsampleseparationhastobecontrolled,astheresultsofthe(FPC)isusedtotestpolyurethaneblends.Thepolyolblendismixedwiththeproperblowingagent(e.g.n-pentaneorThesampleismixedvigorouslytoformahomogenousFilling:ThesampleisthenpouredintotheFPCandtheFPCisclosed,leavingonescrewopentoremovetheairfromtheFPC.sampleshowsonthefrontvalvesoftheFPC.ThensecondvalveoftheFPCisthensealed. FillingoftheOpenthebottomLeavethefrontvalvesopenandholdtheFPC untilsampleshowsonthevalvesClosethefront13TheFPCisattachedtotheMINIVAPVPXpertyzerviaaquickSelecttheGrabnerMethodASTMD6377,themethodtotestvaporpressureofcrudeoils,andPressDuringtemperatureregulationusethemechanicalstirrerattheFPCtoguaranteethatthesamplestayshomogenous.Oncerinsingstarts,endstirring.

AttachingtheFPC yzerandCheckthatallvalvesareAttachthefillingtubetotheFPCandconnectitwiththeinstrumentConnectthe otheOpenthebottomvalvetogetpressureintheOpenthefrontvalveleadingto combinedvaporpressureofthepartialpressureofdissolvedairinthesampleandthevaporpressureoftheliquid.VaporPressureofpolyurethaneblendmixedwithn-Pentane(σ~1SampleFillingMeas.V/LVaporPressureofpolyurethaneblendmixedwithCyclopentane(σ~0.2SampleFillingMeas.V/LAsmalldriftinvaporpressurereadingscouldbeexperienced,ifnostirringwasperformed,whichhomogenizedcontinuouslyandthatthevaporpressurereadingsarerepeatable.Aftereachofthetwotestcycle,twoacetonerinsingswereperformedtoremovesampleresiduefromtheMINIVAPVPXpert.andtheFPCahighly mendablepackagefortheaccuratedeterminationofvaporpressureoffoamstic,polyolandblowingagents.Polyoland35A.GRABNERINSTRUMENTSMINIVAPVPXpert(FPC)与从注射器中排出空气类似，FPCFPC21GRABNERINSTRUMENTSMESSTECHNIKGMBHDr.-Otto-Neurath-Gasse1A-1220：+43/1/2821627-0■传真：+43/1/ ■电子邮件：info.grabner- 。GRABNERINSTRUMENTSMESSTECHNIKGMBH■V1.00如有变更，恕不另行通知。B.FPCMINIVAPVPXpertFPC3（空气）3GrabnerASTMD6377（测试原油蒸气压的方法），37.8°C、V/L4:1件下进行测试。ASTMD6377程序保证样品以恒定速度填充，并且在测量之前也被均质化。将FPC连接到分析仪和馈线1)45)2FPC3barC.ASTMD6377(Ptot)Ptot与正戊烷混合的聚氨酯共混物的蒸气压(σTTV/LPtot20.037.84.0103.2+++++GRABNERINSTRUMENTSMESSTECHNIKGMBHDr.-Otto-Neurath-Gasse1A-1220：+43/1/2821627-0■传真：+43/1/ ■电子邮件：info.grabner- 。GRABNERINSTRUMENTSMESSTECHNIKGMBH■V1.00如有变更，恕不另行通知。(σTTV/LPtot20.037.84.067.5+++++++MINIVAPVPXpertMINIVAPVPXpertFPCGRABNERINSTRUMENTSMESSTECHNIKGMBH