密度法测定聚丙烯结晶度的实验研究

(()102549),,,X,:,1987,,,,,11.11.1.1[1]:,,,,(1)X(%)=Dc(D-Da)D(Dc-Da)100(1):X,%;D,g/cm3;Dc,g/cm3;Da,g/cm3;,,,t(2)()[2]X(%)=0.983+9(t+180)10-4-1/d4.8(t+180)10-6(2):X,%;t,;d,g/cm3;1.1.2,,,,,,,1.1.3(A)1.1.4-;:0.7901.00g/cm31.21.2.1,1.2.2,1.3,23,,,,,,,(1),,1998,5(1):3941,,,,1123456/mm739754129274342584/gcm-30.90600.90420.89920.88400.87700.851322.1,(2),22,%/gcm-3,%100.906064250.9042613100.8992554200.8840355500.87702661000.851303/mm/gcm-3,%12550.88603822550.88603832550.88603842530.88613852570.88573862630.88513772490.88673982450.88703992420.887440102550.8860382530.88623860.00070.882.2,,,10,,,,(3),:S=(X-X)2n-1(3):S;X;X;n3,,(0.001g/cm3),,,,,2.3,,,,,,,,,()2.4,2302.16kg;,,210,2MPa,2430,8MPa,44,%,%15856257563626045856,(164170),,,04199851,,,20,,,,,,,2.5,,,,,,,,,,,,,,,,,,[3],:X,,,,,,[1],,,,X55X,%,%,%X87.681.557045,,,,(),,,,,,,3,,,,X,,,[:1997-10-05]1.,19942.,19723.,1979(53)VOC,VOC()NOx,10000ppmVOC,79%,18%,3%VOC:86%,14%:43%,27%,18%,8%,3%,1%14.5Dg600mm,,,6,55mm22373030204027CF-622000m3,,[:1997-12-01]MANUFACTUREOFLARGEMIXEDMODELSPHERICALTANKSWITHDOMESTICHIGH-STRENGTHQUENCHEDANDTEMPEREDSTEELQiangYueguang(ConstructionandInstallationEngineeringCo.ofBeijingYanshanPetrochemical(Group)Co.,Ltd.)ABSTRACTTheexperiencesonmanufacturinglargemixedmodelsphericaltankswithdomesticCF-62Steelwasintroducedinthispaper.Themethodsforen2suringtheprecisegeometricaldimensionsandcur2vaturesofthesphericalshellplateofthetankswerealsoelucidatedindetails.Keywords:MixedmodelSphericalTank,High-StrengthQuenchedandTemperedSteel(41)DETERMININGTHECRYSTALLINITYOFPOLYPROPYLENEWITHTHEDENSITYGRADIENTMETHODWangYanlai(ResearchInstitute,BeijingYanshanPetrochemical(Group)Co.,Ltd.)ABSTRACTCrystallinityofpolypropylenewasdeterminedwiththedensitygradientmethodinthispaper.Thelinearrelationbetweenthedensityandcrys2tallinityofthepolymerswasstudied.ThedensitydataofthesamplespreparedbydifferentmethodsanddeterminedbymethodofX-rayanddensitygradientmethodwerecompared,andprecisionoftestdatawerediscussed.Itwasindicatedthatthedensitygradientmethodpossessedtheadvantagesofeasy-operation,time-savingandhighreliabili2ty.Keywords:polypropylene,density,crys2tallinity35.