高耐压高硬度橡胶材料的研究

20095()10497UDC104972060021Studyontherubbermaterialwithhighpressureresistanceandhardness4300702009520095I(NBR)NBR-181.DCP++S4010NA/RD2.5DOS16HVA-22N774/N33080/6014088A13.2MPa176%2%20MPa2%NaCl2./N774/N33060/451051585A20MPa17.9MPa213%4.7MPa37%8%2%NaClIIAbstractAcrylonitrile-butadienerubber(NBR)hasbeenextensivelyusedasoilresistantsealantduetothepolarcyanogengroupsonitsmainchainanditslowcost.NBRwithhighacrylonitrilecontentisoftenusedtopreparesealingrubbermaterialswithhighhardnessandpressureresistance,nevertheless,thepoorwaterandcoldresistanceareobstaclestoitsapplications.NBRwithlowacrylonitrilecontent(NBR-18)hasoutstandingoil,waterandcoldresistantperformancesbutlowstrengthandlowhardness.Inthispaper,weaimtoincreasethestrengthandhardnessofNBR-18withoutsacrificingitsoil,waterandcoldresistance.Ourmainworkcanbelistastwopartsasfollows1.Therubbermaterialwithhighhardnessandhighpressureresistancewaspreparedbyselectingthepropertypeandamountofcarbonblack,appropriatevulcanizingsystemageingprotectivesystemcold-resistancedplasticizingsystemwhileaddingacertainamountofauxiliarycrosslinkingagent.Thetestofvulcanizingcharacteristicsofrubbermixandthemeasurementofmechanicalpropertiesandswellingdegreeofvulcanizatewerecarriedouttoinvestigatethecomprehensivepropertiesofvulcanizateandtooptimizetheformulation.Themeasurementoftheresistancetomediumandpressureofthevulcanizatewithoptimizedformulationwascarriedoutandopticalmicro-analysisofthecompressedsurfacewasalsocarriedout.Theresultofthestudyshows:whenchoosingthecompoundvulcanizingsystemofDCPandacceleratorandSulfur,80/60portion(140intotal)ofcarbonblackN774/N330asthefiller,2.5portionof4010NA/RDastheantioxidant,16portionofDOSastheplasticizer,2portionofHVA-2astheauxiliarycrosslinkingagent,thehardness,tensilestrength,elongationatbreakandtensilesetatbreakofthevulcanizeswereover88(shoreA),13.2MPa,176%,2%respectively.Meanwhile,thecold-resistancesealingrubbermaterialhasalowcompressionset,resistanttopressureover20MPa,andwellresistanttomethylsiliconeoilandsaltwater(2%NaClaqueoussolution).2.Magnesiummethyacrylate(MDMA)andzincmethyacrylate(ZDMA)wereaddedandinproportiontoacertainamountofcarbonblacktoincreasethehardnessandpressureresistance.ThetestofvulcanizingcharacteristicsoftheNBRcompositeandthemeasurementofmechanicalpropertiesandswellingdegreeofvulcanizatewerecarriedout,andtheformulationwasalsooptimized.ThemeasurementoftheIIIresistancetomediumandpressureofthevulcanizatewithoptimizedformulationwascarriedoutandopticalmicro-analysisofthecompressedsurfacewasalsocarriedout.Theresultofthestudyshows:Inthemethacrylate/carbonblackcompositereinforcingsystem,thepropertyofMDMAtoNBRcompositesisbetterthanZDMAundertheconditionofotherconstantcomponents.Thehardness,compressivestrength,tensilestrengthandelongationatbreakofNBRwere85(shoreA),over20MPa,17.9MPaand213%respectivelywith15portionofMDMA.4.7MPaand37%wereincreasedComparedtoanofpurecarbonblacksystem.Inaddition,thecompositerubbermaterialhasalowercompressionsetandtensilesetatbreak,andanexcellentperformanceofresistancetomethylsiliconeoilandsaltwater(2%NaClaqueoussolution)andsuperiorlow-temperatureresistance.Keyword:highhardness;highpressureresistance;oilresistance;waterresistance;NBRIV..........................................................................................................................IABSTRACT..................................................................................................................II1................................................................................................................11.1..................................................................................................................11.2..........................................................................................11.2.1...................................................................................11.2.2...............................................................................11.2.3...............................................................31.2.4...................................................................41.3..........................................................................51.3.1...............................................................51.3.1.1.......................................................................................51.3.1.2...........................................................................51.3.1.3...................................................................61.3.2...............................................................................71.3.2.1.......................................................................................................71.3.2.2.......................................................................71.3.2.3.......................................................................71.3.2.4...................................................................................81.3.3...................................................................91.3.4..