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(自然科学版)24JournalofSouthChinaUniversityofTechnologyVol.24Supplement1996 12(NaturalScience)December 1996/*———张 力 张力田() (MMA/BA/AA/HEMA)。IR、DSC,GPC。,LDPE,,。 丙烯酸酯;预共聚物;淀粉;共混/接枝 O636.1;TQ314.1;TQ321.230,。,。[1,2]。,,。、,,,[3]。,。。,,(IR)、(DSC)、。1 实验部分1.1 原料(MMA)、(BA)、(AA)、(HEMA),。(BPO),,(EGBE)、(IP)。:1996-01-10*、、,,1967,,;:。。5106311.2 丙烯酸酯类预聚物的合成MMA、BA、AA、HEMA、IP、EGBEIⅡ,、Ⅰ,,MMABPO,20min,BPOⅡ,2h,1h,,,,,,。1.3 预聚物的分析测试1.3.1 (IR)NICOLET-205。1.3.2 Perkin-ElmerDSC-2C,10mg,10℃/min,41.84mJ/s。1.3.3 (GPC)Waters208GPC,,。1.4 预聚物改性淀粉填充LDPE薄膜的力学性能测试GB1040-79。2 结果与讨论2.1 预聚物的表征2.1.1 IR1。、、1。1 Fig.1 IRspectrumofcopolymer IR,3600cm-1,,HEMAO-H;3500-3400cm-1,,,[4];1180、1190、1240cm-1C—C—O—CMMA;940cm-1960cm-1BA。,MMA、BA、1 IRTable1 AnalysisofIRspectrumofcopolymer (cm-1) 3600,HEMAO—H3500-3400,HEMA,AAO—H2955MMA,BA,HEMAC—H2871,1450MMA,BA,HEMA,AA—CH21732MMA,BA,HEMA,AAC=O1600AAR—C—O1240,1180,1190MMAC—C—O—C960,940BABA55 :/——— HEMA、AA,。1H-NMR,IR。21H-NMR,2。2 1H-NMRTable2 Analysisof 1H-NMRspectrumofcopolymer 0.92-CH3MMA,HEMA1.06-CH3BA1.25-CH3MMA,BA3.60MMA3.96—COO—CH2BA,HEMA2 1H-NHR(:DMSO)Fig.2 NMRspectrumofcopolymer(solvent:DMSO)2.1.2 DSC3DSC,,Tg37.3℃。4PMMA、PBA、PHEMAPAATg:106、-54、86、105℃[6],DSC,。MMA(r1=1.74)BA(r2=0.20)[6],PMMA,PBA。,DMSO(δ=26.5J/(cm3)1/2),PMMAPBA(δ18.618)。IR、1H-NMRDSC,,。3 DSCFig.3 DSCcurveofcopolymer4 GPCFig.4 GPCcurveofcopolymer56 24 2.1.3 4GPC,Mw=2.84×104,Mn=1.02×104,DP=2.78,,,。2.2 经预聚物改性的淀粉填充LDPE薄膜的力学性能3,,LDPELDPE,,,。3 *Table3 Mechanicalpropertiesofthefilm (MPa)(%)LDPE15.6120/LDPE12.1108/LDPE9.397* (wt%):30%3 结论(1)MMA、BA、HEMA、AA,IR、1H-NMRDSC。(2)LDPE,。 1 Patil,DamodarFanta.R.GeorgeF.SynthesisandProcessingofGraftCopolymersfromCornstarchandMethylAcrylate:PhysicalandMechanicalProperties,Starch,1994,46:1422 Willett.JuliousL.BiodegradablePlastics,USPatent5087650,1992-02-113 ,..,1993,7(1):264 Ping,Zheng-HuaNeel.JeanExtrusion-GraftingStarchOntoVinylicPolymers.Macromol.Chem.,1988,189:4375 SimonsWW,ZangerM.TheSadtlerGuidetotheNMRSpectraofPolymers.SadtlerResearchLaboratoriesInc.1973,1766 BrandrupJ,ImmergutEH.PolymerHandbook,2nd.Ed.:JohnWileyandSons,Inc.,1975,143,24957 :/——— STUDYONSTARCHMODIFIEDBYBLENDING/GRAFTINGWITHACRYLICPRE-COPOLYMER—PRE-COPOLYMERIZATIONOFACRYLICSFORSTARCHMODIFICATIONZhangLi ZhangLitian(Inst.ofLightChemicalEng.,SouthChinaUniv.ofTech.)Abstract Acopolymerhasbeenpreparedfrommethylmethacrylate,butylacrylate,acrylicacidandβ-hydroxyethylmethacrylate.IRandDSCwereusedtoanalyzethecompositionofthecopolymer.ThemolecularweightandthemolecularweightdistributionofthecopolymerweredeterminedbyGPC.ThestarchmodifiedwiththecopolymerwasfilledinLDPE,theblendfilmhadimprovedtensilestressandelongationatbreakcomparedwithLDPEfilmfilledwithstarchmadifiedwithhomopolyacrylicsKeyworks acrylics;pre-copolymer;starch;blending/grafting58 24
本文标题:丙烯酸酯类共聚物共混接枝淀粉的研究改性用丙烯酸酯的预共聚张力
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