摘要
He,CO2,O2,N2,CH4,C3H8,andt-C4H10gaspermeabilitycoefficientsanddiffusioncoefficientsofpoly（4-methylpentene-1）（PMP）withvariousdegreesofcrystallizationwereplottedagainstthedegreeofcrystallization.Theplotdemonstratedalinearrelationship.ThegaspermeabilitycoefficientanddiffusioncoefficientofpureamorphousandpurecrystallinePMPswereevaluatedbyalinearextrapolationtozeroand100%crystallinity,respectively.TherelationshipbetweenthediffusioncoefficientofcrystallinepartsofPMPandthekineticdiameterofpenetrantgaseswasdiscussed.Syndiotacticpolystyrene（SPS）couldexistasδformcrystalscomplexedwithorganicsolventssuchasbenzene,toluene,xylene,andethylbenzene.ThemesophaseofSPSispreparedbyannealingtheδformofcrystallinecomplexesatacertaintemperaturefor1h.Thedesorptionofsolventduringannealingalmostdoesnotresultinchangesofboththeconformationofbackbonechainsandthecrystallattice.Wecouldpreparethemesophasecontainingmolecularcavitieswiththesizeandshapeoftheorganicsolventmolecules.ThemesophasecouldsorbthesamesolventafterthemannerofLangmuirsorptionatlowvaporpressurerangewhilethiswouldnotbethecaseforsolventsofdifferentsizeandshape.Thissuggestsamolecularrecognitionoforganicsolvent,andmesophaseSPSmightbeusefulforseparationmembraneandadsorptivematerial.
出版日期
2000年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
