超高分子量聚乙烯在溶液中的链缠结与黏度的关系

215Vol.21,No.520059POLYMERMATERIALSSCIENCEANDENGINEERINGSept.2005X,,,,,,(,230026):(UHMWPE),UHMWPE,,,,,UHMWPEKA:;;:O631.4:A:100027555(2005)0520122203PE(UHMWPE,M{v1.5106,M{w3106),,[1]Bueche,:,DSC[2](UHMWPE),UHMWPE[24],,,[5];UHMWPE,Kmax,UHMWPE[6]UHMWPE1340#,500#520#0.1gö100mLUHMWPEö,130,135,;UHMWPEö,22.1KAPE,,,,,,,UHMWPE,KA,KA100PEHugginsKraemer,[G],Mark2Houwink[G]=KM{AGKA[3,4]:[G]decalin,135=6.210-4M{0.70G(1)2100[G]decalin,130=3.7810-4M{0.72G(2)3120,10,KA340#(340),340#(1)(2),:UHMWPEKAX:2004204206;:2004207222:3.781040.72,340#:M{G=3.41106;500#:M{G=3.05106;520#:M{G=5.321062.2,:,,,,,0.74,,,,,,,,,,UHMWPEUHMWPE(M{G300),,,,UHMWPE,,,,,,,,[7,8],,UHMWPE,;,,,GspöC,,,PE,GspöC,,Kmax:V=MöCõN0:C,gömL;M,gömol;N0Avogadra,VV,Vcr,:Vcr=PõV(P)V=b3õM3ö2(b)Vcr=Mö(CcrõN0)=Põb3õM3ö2CcrõM1ö2=CcrõN1ö2=,NFig.1GspöCCrelationshipofthreedifferentmolecularweightofPEsTab.1Severalparametersof500#,340#and520#samplesSamples500#340#520#M{G3.051063.411065.32106N1.091051.211051.90105Ccr0.580.560.44lgN5.03745.08285.279lgCcr-0.237-0.252-0.357UHMWPE,GspöCCFig.1,,GspöC,,GspöCGspöCC,(Ccr),,,Tab.1M.Mntsuo,,N,,,3215:,KmaxKmaxKmax1öC,,Kmax,UHMWPECcr,Kmax,Ccr,,,lgNlgCcrFig.2,:Ccr=214N-1ö2,CcrõN1ö2=,UHMWPE,,Fig.2RelationshipbetweenNandCcr3(1),UHMWPEKA(2)UHMWPE,UHMWPE,[5,7,8],,[9](3):[1]BirnkrautWH,BraunG,FalbeJ.J.Appl.Polym.Sci.:Appl.Polym.Symp.,1981,36:7988.[2]QinJ,HuPP,etal.J.App.Polym.Sci.,1994,51:14331440.[3]ChiangR.J.Phys.Chem.,1965,69:1645.[4]StacyCJ,ArnettRL,J.Polym.Sci.,1964,A2:167.[5]OgitaT,MatsuoM.Polymer,1991,32:822834.[6](ZHUQing2ren),(HONGKun2lun),.(ActaPolymericaSinica),1995,(6):658663.[7]DeGennesPG.Macromolecules,1976,9:587598.[8]ZachariadesAE.J.Appl.Polym.Sci.,1988,35:12651281.[9]CornetCF.Polymer,1965,6:373.THERELATIONSHIPBETWEENTHECHAINENTANGLEMENTANDVISCOSITYINUHMWPESOLUTIONSPANGWen2min,WUWei2tai,WANGYu2song,NIEKang2ming,LUFei,ZHUQing2ren,FANCheng2gao(StructureResearchLaboratory,UniversityofScience&TechnologyofChina,AcademiaofSinica,Hefei,Anhui230026,China)ABSTRACT:InthispaperwemeasuredaseriesofviscositiesofthreedifferentUHMWPEsamplesfromtheirextreme2dilutetocomparativelyhighconcentrationsolutions,determinedtheircriticalconcentrationsandgaveforthaquantitativerelationbetweencriticalconcentrationandthedegreeofpolymerization,whichcorrelateswellwiththechainentanglementmodel.Atthesametime,inordertodeterminethemolecularweightsofthesamplesemployed,acouplevaluesofK,AwhichismostsuitableforUHMWPEisselected.Keywords:UHMWPE;chainentanglement;viscosity4212005