課件成果講稿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)與從注射器中排出空氣類似，F(xiàn)PCFPC21GRABNERINSTRUMENTSMESSTECHNIKGMBHDr.-Otto-Neurath-Gasse1A-1220：+43/1/2821627-0■傳真：+43/1/ ■電子郵件：info.grabner- 。GRABNERINSTRUMENTSMESSTECHNIKGMBH■V1.00如有變更，恕不另行通知。B.FPCMINIVAPVPXpertFPC3（空氣）3GrabnerASTMD6377（測試原油蒸氣壓的方法），37.8°C、V/L4:1件下進(jìn)行測試。ASTMD6377程序保證樣品以恒定速度填充，并且在測量之前也被均質(zhì)化。將FPC連接到分析儀和饋線1)45)2FPC3barC.ASTMD6377(Ptot)Ptot與正戊烷混合的聚氨酯共混物的蒸氣壓(σTTV/LPtot20.037.84.0103.2+++++GRABNERINSTRUMENTSMESSTECHNIKGMBHDr.-Otto-Neurath-Gasse1A-1220：+43/1/2821627-0■傳真：+43/1/ ■電子郵件：info.grabner- 。GRABNERINSTRUMENTSMESSTECHNIKGMBH■V1.00如有變更，恕不另行通知。(σTTV/LPtot20.037.84.067.5+++++++MINIVAPVPXpertMINIVAPVPXpertFPCGRABNERINSTRUMENTSMESSTECHNIKGMBH