ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In order to improve the hydrophilicity of poly (D,L-latide) (PDLLA), a novel amphiphilicABA-type triblock copolymers of poly-N-vinylpyrrolidone (A) and poly (D, L-lactide) (B), weresuccessfully synthesized by atom transfer radical polymerization (ATRP) using N-vinylpyrrolidone(VP) as monomer, bromide-terminated poly (D,L-latide) oligomer (Br-PDLLA-Br) as functionalmacromolecular initiator which was prepared when hydroxy-terminated poly(D,L-latide) oligomer(HO-PDLLA-OH) reacted with 2-bromopropanoyl bromide, CuBr/2,2’-bipyridine complex as thecatalyst system. The resulting copolymers were characterized by various analytical techniques. Theresults showed that the introduction of poly (N-vinylpyrrolidone) (PVP) segments into polylactideenhanced the surface hydrophilicity of the copolymers remarkably and amphiphilic polymer canself-assemble into core-shell structure (polymer micelle) in water by the balance of the hydrophilicand hydrophobic interaction
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.461.pdf
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