交联剂分子量对高吸水性树脂性能的影响

*2003-07-21,2003-09-10;(10334020);***孙民伟张健高彦芳谢续明**(100084)(PEGDA),.FTIRPEGDA.,,,,.,PEGDAN,N-(MBA),;,.,,,,,,[1~4].,,,,,[5].,(2---[6],[7]),.,,,,.,N,N-(MBA),MBA,,,,,,,[8].,,-(),3,,,3,,[9];[10];,[11];[12].,[13].,.[14].(PEGDA),,.111(AA)N,N-(MBA)(PEG,),;,..12(PEGDA)[15](AC),241ACPEG(EG),,.,ACHCl.EG2004006001000PEGAC,Scheme1.,EGDAPEGDA200PEGDA400PEGDA600420048ACTAPOLYMERICASINICANo.4Aug.,2004595PEGDA1000.HO[CH2CH2O]nH+2CH2CHCOClCH2CHCOO[CH2CH2O]nCOCHCH2Scheme1ThesynthesisrouteofPEGDA13AA,50%,,,,,,,,.14141[16,17]01gw1,24h,200,w2.Qeq(gg)=w2w1142[7]005g(100),,30s200,;,1min.15151m1g(01g),,2min,,9516h.m2.m(%)=m1-m2m1100152p1g(01g),120,,20%24h[12],9516h,p2.d(%)=p1-p2p1100-m221FTIR1,3500cm-1,PEG,;1730cm-1Fig.1TheFT-IRspectraofPEG200andPEGDA200,1760cm-1,,;930cm-1CCl,.1100cm-1CO,,.22221EGDAPEGDA5,,,2.Fig.2Therelationshipsofthemolratioofthecrosslinkerstomonomerandtheequilibriumswellingratioofthecorrespondingsuperabsorbents2,,,,...,;,,,5962004,.EGDAPEGDA200PEGDA400PEGDA600PEGDA1000,()06410-305310-305410-305410-305910-3.,15621886185218521695.,,,.Nc=1cNc,c().2,,,14403460.,,3.Fig.3Variationofabsorbencywithmolecularweightofcrosslinkersindeionizedwater3,.,,;,.,,,,,4.Fig.4Schemeoftheeffectofmo-lweightofcrosslinkersintheequilibriumswellingstate,,,4,5,EGDAPEGDA200PEGDA400PEGDA600PEGDA1000.,,.,,,,,.PEGDA1000.22205510-3,,,6.,7..Fig.5Therelationshipoftheareaofmeshandtheequilibriumswellingratioofthesuperabsorbents6,,;,.7,.[18~20],,5974:Fig.6Thewater-swellingrateoftheresinsFig.7Therelationshipoftimeanddegreeofwater-absorbentsaturationoftheresinscrosslinkedbydifferentcrosslinkers,.,,,..,,.,,,,.23MBA,.PEGDA,.0110-3molN,N-0110-3molPEGDA1000,.1.,,.,MBA.MBACH2CHCOO(CH2CH2O)nOCCHCH2,,.Table1ThecomparisonofthereactiondegreeofmonomercrosslinkedbydifferentcrosslinkersCroselinkerQeq(gg)Contentofresidualmonomers(%)Contentofdissolublepolymers(%)MBA5163489PEGDA100034601549,,,,,,,,,.,.,,,,.REFERENCES1MoriokaK,NakahigashiS.Refrigeration,1992,618:39~432DusekK.AdvinPolymSci,1993,109:110~1153BuchholzFL.ModernSuperabsorbentPolymerTechnology.NewYork:AcademicPress,1998.209~2214HuttermannA,ZommorodiM,ReiseK.Soil&TillageResearch,1999,50(3~4):295~2985LinRunxiong(),WangJiwei().PolymerBulletin(),2000,(6):85~936DavisTP,HuglinMB.Macromolecules,1989,22:2824~28297FengJH,MengPQ.JMaterSci,2001,36(3):731~7388SmithPB,CutieSS,HentonDE,PowellC,KosmanJ,HowellBA.JPolymSciA:PolymChem1997,35:799~8069YinYL,ProdhommeRK,StanleyFW.PolyelectrolyteGels.WashingtonDC:AmChemSoc,1990.1~2310ArriolaDJ,CutieSS,HentonDE,PowellC,SmithPB.JApplPolymSci,1997,63(4):439~45111TorokG,LebedevVT,CserL,BuyanovAL,RevelskayaLG.PhysicaB,2000,276~278:398~399598200412YiGuobin(),CuiYingde(),LiaoLiewen(),GuoJianwei().ChemicalIndustryandEngineeringProgress(),2001,(6):43~4513JiangDuxiao(),SongLingying().ChemistryandAdhension(),1999,(3):115~11714ZhangJian,SunMinwei,ZhangLe,XieXuming.JApplPolymSci,2003,(7):1851~185615ZengShe(),YuYunfeng(),LiangYao().PaintandCoatingsIndustry(),1996,(2):20~2416HePeixin(),XiaoWeidong(),HuangHe().PolymericMaterialsScienceandEngineering(),1999,15(6):65~6817LeeWen-fu,HuangYu-lin.JApplPolymSci,2000,77:1749~175918FloryPJ.PrinciplesofPolymerChemistry.NewYork:CornellUnivPress,1953.Chap.13,541~59319TanakaT,NishioI,SunST.Science,1982,218:467~46920LiuTingdong(),LiuJing().PolymerBullitin(),1994,(3):181~185THEEFFECTOFCROSSLINKERSONSUPERABSORBENTSSUNMinwei,ZHANGJian,GAOYanfang,XIEXuming(DepartmentofChemicalEngineering,TsinghuaUniversity,Beijing100084)AbstractAseriesofcrosslinkers(polyethyleneglycoldiacrylate,PEGDA)withdifferentmolecularweightsweresynthesizedthroughend-cappingofPEGbyacryloylchloride.ThestructuresofthePEGDAswerecharacterizedbyFTIR.Thewater-absorbencyofsodiumpolyacrylatecrosslinkedwithPEGDAswasdetermined.Intheexperimentsofwate-rswellingindeionizedwater,itwasrevealedthatwhenthemolecularweightofthecrosslinkerincreased,themaximumofequilibriumwater-absorbabilityofthesynthesizedsuperabsorbentswasenhancedandtherateofwater-swellingincreasedtoo,buttherelativerateofwater-swellingdecreased.Therelationshipbetweenthenetworkstructureofthesuperabsorbentsandthewater-absorbencywasalsodiscussed.ComparingPEGDAandMBA,thesuperabsorbentscrosslinkedwiththeformerhadmuchstrongerwater-absorbability,fewerresidualmonomersandlessdissolublelinearpolymersthantheonecrosslinkedwiththelatter.KeywordsPEGDA,Superabsorbent,Sodiumpolyacrylate,Crosslinker,Water-absorbability5994: