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Synthesis and Solution Properties of PDMS-b-PEO Amphiphilic Diblock Copolymers

ZHANG Qing-Hua, 浙江大学化工系, 杭州 310027,Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, P. R. China, CHEN Bi, ZHAN Xiao-Li, CHEN Feng-Qiu
2009 Wuli huaxue xuebao  

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Abstract: Aseriesofwell鄄definedpolydimethylsiloxane鄄b鄄poly(ethyleneoxide)(PDMS鄄b鄄PEO)amphiphilicdiblock copolymersweresynthesizedbythecombineduseofanionicring鄄openingpolymerizationofhexamethylcyclotrisioxane (D 3 )with n鄄butyllithiumastheinitiatorandhydrosilationbetweenSi-HterminatedPDMSandallyterminatedPEO homopolymers.ThestructuresofPDMSandamphiphilicdiblockcopolymersPDMS鄄b鄄PEOwereverifiedbynuclear
more » ... showedmonomodalgelpermeationchromatography(GPC)traceswhichindicatednarrowmolecularweightdistributions (MWDs).Additionally,thesolutionpropertiesofthesediblockcopolymerswereinvestigatedusingtensiometryand transmissionelectronmicroscopy(TEM).Theequilibriumsurfacetension 酌 andcriticalmicelleconcentration(cmc)of PDMS鄄b鄄PEOinanaqueoussolutionwasalsoinvestigated.Interestingly,thecmcincreasesasthelengthofthe hydrophobicchainincreases.TransmissionelectronmicroscopyshowedthatPDMS鄄b鄄PEOdiblockcopolymersinthe aqueoussolutionself鄄assembledintovariousmorphologiesincludingspheres,rods,andvesicleaggregates.
doi:10.3866/pku.whxb20090606 fatcat:vf77nobb2rdhtgug7f3h7c6weu
Citation

ZHANG Qing-Hua, 浙江大学化工系, 杭州 310027,Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, P. R. China, CHEN Bi, ZHAN Xiao-Li, CHEN Feng-Qiu. "Synthesis and Solution Properties of PDMS-b-PEO Amphiphilic Diblock Copolymers." Wuli huaxue xuebao 25.06 (2009) 1075-1080