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《Journal of Beijing University of Chemical Technology(Natural Science Edition)》 2006-03
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Synthesis and properties of amphiphilic block polylactide copolymers

LIU Jian SHI Shu-xian XIA Yu-zheng LIU Xing-xin JIAO Shu-ke LI Xiao-yu(Key Laboratory of Science and Technology of Controllable Chemical Reactions,Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China)  
Novel amphiphilic block copolymers of poly-N-vinylpyrrolidone and poly(D,Llactide) were synthesized by atom transfer radical polymerization using N-vinylpyrrolidone as the monomer and a polylactideterminated with bromine,which was prepared by reaction of a hydroxy-terminated polylactide oligomer with α-bromopropanoyl bromide in the presence of a CuBr/2,2'-bipyridine catalyst,as a functional macromolecular initiator.The products were characterized by IR and GPC.The properties and morphology of the copolymers were determined by contact angle and water take-up measurements and by TEM.The results showed that introduction of the PVP chain markedly enhances the surface hydrophilicity of the copolymers and the amphiphilic polymer can self-assemble into a core-shell structure(polymer micelle).
【CateGory Index】: TQ316.33
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