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Polymer Bulletin
Published in: Polymer Bulletin 12/2013

01-12-2013 | Original Paper

Poly(l-lactide) initiated by silver N-heterocyclic carbene complexes: synthesis, characterization and properties

Authors: Sıla Balcan, Mehmet Balcan, Bekir Çetinkaya

Published in: Polymer Bulletin | Issue 12/2013

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Abstract

Poly(l-lactide) (PLLA) was successfully synthesized by ring-opening polymerization (ROP) in bulk using silver N-heterocyclic carbene (Ag–NHC) complex. The effect of reaction time, temperature and monomer/initiator ratio on polymerization process were determined. The optimum conditions were found as 130 °C, 4 h and M/I molar ratio of about 100. The polymers were characterized by FTIR, 1H-NMR, GPC and TG. High-molecular-weight PLLA (M w = 3.78 × 104, M n = 1.91 × 104, PDI = 1.97) was synthesized by the ROP of l-lactide (LLA) with bis-(N-methyl N′-dodecylimidazole) silver(I) di-bromo argentate (1a) in bulk. The effect of different N-substituted ligand groups on the polymerization was studied. The antimicrobial activity of the synthesized polymers were investigated by using minimum inhibitory concentration test against gram positive (Staphylococcus aureus) and gram negative (Escherichia coli and Pseudomonas aeruginosa). It was observed that the synthesized polymers displayed moderate antimicrobial activity.
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Metadata
Title
Poly(l-lactide) initiated by silver N-heterocyclic carbene complexes: synthesis, characterization and properties
Authors
Sıla Balcan
Mehmet Balcan
Bekir Çetinkaya
Publication date
01-12-2013
Publisher
Springer Berlin Heidelberg
Published in
Polymer Bulletin / Issue 12/2013
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-013-1034-9

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