简介：Thepaperproposestheidentificationmethodoflinearandnon-linearchromatographicsystem.IsothermsandlumpedmasstransfercoefficientsofchromatographyseparatingisomersorbitolandmannitolonD80adsorbentaredetermined.Theanalysesofrootmeansquareerrorofchromatographyelutioncurvesarecarriedout.Theresultsshowthatthesystemstudiedisnon-linearandthetheoreticalelutioncurvesofthenon-linearchromatographicmodelaremoreaccuratethanthoseofthelinearchromatographicmodel,Resultsofparametersensitivityanalysesshowthatelutioncurvesofnon-linearchromatopraphicseparationaremoresensitivetothevariationofparameter“ai”intheadsorptionisothermsQi=Ci^*/(ai+biCi^*)thantothevariationofparameter"bi”aswellaslumpedmasstransfercoefficients.

简介：Lineardrivingforce(LDF)modeliswidelyusedinadiffusionprocess,However,thismodelhasinherentweakness.Whenthedimensionlesstimeislessthan0.1itsrelativeerrorisupto95%.Inthispaper,anewconcentrationprofileisproposed.andthenanewmodifiedLDFmodel(MLDF)isdeduced.Comparedwiththeexactsolutionofintraparticlediffusionequation,thetransientvolume-averageamountadsorbedcalculatedfromtheMLDFismoreaccuratethanthatcalculatedfromtheLDFmodel.Ifonetakes±10%relativeerrorforthelimitofvalidityofapproximation,thenewmodelisvalidwhenthedimensionlesstimeisjustlargerthan0.0002,whiletheLDFmodelisnotvaliduntilthedimensiontimeislargethan0.05,ThenewmodelissuperiortotheLDFmodel.ThenewconcentrationprofilescorrespondingtotheMLDFmodelaremuchclosetotheexactconcentrationprofileswithinaparticlethantheparabolicprofilescorrespondingtotheLDFmodel.

简介：Newacetylenemonomers,6-{[(1-naphthylethynyl-4-phenyl)carbonyl]oxy}-l-phenyl-l-hexyne(1),2,5-diethynylthiophene(3),and4,4′-diethynylbiphenyl(6)weresynthesized.Homopolymerizationof1andcopolycyclotrimerizationsof3and6with1-heptyneandl-octynehavebeenachievedwithWCI6-andTaC15-Ph4Sncatalysts,respectively,givingsolublelineardisubstitutedpolyacetylene(2)andhyperbranchedpolyarylenes(5and8)withhighmolecularweights(upto1.2×105)inhighyields(upto98%).ThestructuresandpropertiesofthepolymersarecharacterizedandevaluatedbyIR,NMR,TGA,UV,photoluminescence(PL),andelectroluminescence(EL)analyses.Allthepolymerspossesshighthermalstabilityandemitstrongbluelightuponphotoexcitation.Theintensityoftheemittedlightisgreaterthanthatofpoly(1-phenyl-1-octyne),awell-knownhighlyluminescentdisubstitutedpolyacetylene.Littleaggregation-inducedredshiftinthePLwasobservedinthethinfilmsofthepolymers.Byconstructingamulti-layerELdevice,highELquantumyield(0.18%)hasbeenachievedin2,whicharethebestresultsforsubstitutedpolyacetylenesattainablesofar.

简介：聚氨酯，是在论文介绍的组成的研究的题目，基于Bayer生产的oligocarbonatediolsDesmophenC2100?。组成的建模考虑到作为intervertebral圆盘prostheses的inlay使用材料被执行。聚氨酯被假定是非线性地viscohyperelastic，各向同性、不可压缩。组成的方程从要求的紧张精力功能被导出。橡皮和rheological常数根据试验性的测试被识别，即松驰测试和monotonic以二不同紧张率的单轴的测试，即\(\dot\lambda=0.1\)min1和\(\dot\lambda=1.0\)min1。僵硬张肌被导出并且介绍给Abaqus吗？有限元素(FE)软件以便数字地验证组成的模型。常数鉴定和数字实现的结果证明导出的组成的方程是充分足够的为聚氨酯材料的压力紧张行为建模。

简介：由三个联本基组组成的芳香的amphiphilic分子(1)作为一个僵硬的杆片断并且poly和醚契约连接了(乙烯氧化物)与是重复17的单位的数字，一个卷片断被综合，并且他们的自己组装处于体积状态的行为和水的答案被调查。大批，分子1进1-D自我装配处于稳固的状态的薄片状的结构或在经由合作社的水晶的阶段完成的液体的近晶的A阶段-叠的、微阶段的分离和氢契约相互作用。在里面冲淡水的答案，分子1被观察到进圆柱的微粒自我装配几百纳米的拥有的一致直径和长度。

简介：Linearpolysiloxaneswithpendantbenzo-15-crown-5moietieshavebeensynthesizedfrom3′-or4′-allylbenzo-15-C-5viahydrosilylationofmethyldichlorosilane,followedbypolycondensationwithsilanol-terminatedpolydimethylsiloxane.Itwasfoundthatthepolysiloxanescouldbeusedascarriersinbulkliquidmembranetotransportions.Factorsinfluencingtransportratehavebeeninvestigated.

简介：Lamellarcrystalsofdiblock,triblockandfour-armpoly(ethyleneglycol)-b-poly(ε-caprolactone)(PEG-b-PCL)crystalline-crystallinecopolymersweresuccessfullyobtainedfromtheirsolution.Morphologyandstructureoflamellarcrystalsofcrystalline-crystallinecopolymerswereinvestigatedusingtapping-modeatomicforcemicroscopy(AFM)andselectedareaelectrondiffraction(SAED).Allofthesesamplesshowedthetruncated-lozengemultilayerbasalshapeswithcentralscrewdislocationorcentralstack,whichwereallobtainedsimultaneouslyfromtheoilbath.ThediffractionpatternofPEGblocklamellarcrystalisattributedtothe(120)diffractingplanesandthepatternofPCLblocklamellarcrystalisattributedtothe(110)diffractingplanesand(200)diffractingplanesaccordingtotheSAEDresults.Four(110)crystalgrowthplanesandtwo(200)crystalgrowthplanesarediscoveredforthePCLblocks,butthe(120)crystalgrowthplanesofPEGblocksarehidedinthefigureofAFM.Thecrystallinestructureofthefour-armcopolymers(FA)ismoredisorderandconfusedthanthatofthediblock(DI)copolymerandthestriatedfoldsurfacestructuresoflamellarcrystalsoffour-armcopolymers(FA)aresmootherthantheseoflinearanalogues,owingtotheconfusedcrystallizationofblockscausedbythemutualrestrictionofblocksandthehindranceofthedendriticcores.Inaddition,theaspectratioofFAisgreaterthanthatoftheothers.Itishypothesizedthattherearetworeasonsforthechangeofaspectratios.First,the(200)diffractingplanesofPCLcrystalsgrewslowlycomparedtotheir(110)diffractingplanesbecauseofdifferenceintheenergybarrier.Secondly,edgedislocationsonthe(200)diffractingplanesarealsoresponsibleforthevariationoftheaspectratio.Consequently,thecrystallinedefectsareaugmentedbythecompetingblockscrystallizedsimultaneouslyandthehindranceofthedendriticcores.